1.
It is the study of how organisms live and how they interact with their environment.
Correct Answer
D. Ecology
Explanation
Ecology is the study of how organisms live and interact with their environment. It focuses on understanding the relationships between living organisms and their surroundings, including other organisms, physical factors, and resources. This field of study helps us understand the balance and dynamics of ecosystems, the impact of human activities on the environment, and the conservation of biodiversity.
2.
It is the study of the ecology of a single species.
Correct Answer
A. Autecology
Explanation
Autecology refers to the study of the ecology of a single species. It focuses on understanding the interactions between an organism and its environment, including factors such as its behavior, physiology, and adaptations. Autecology aims to examine how a species survives, reproduces, and interacts with other species in its ecosystem. This field of study provides valuable insights into the specific ecological requirements and dynamics of individual species, contributing to our overall understanding of ecosystems and biodiversity.
3.
It is the study of the ecology of whole communities of organisms.
Correct Answer
D. Synecology
Explanation
Synecology is the correct answer because it refers to the study of the ecology of whole communities of organisms. Autecology focuses on the study of individual organisms and their interactions with the environment, while oncology is the study of cancer. Symbiology is not a recognized field of study in ecology. Therefore, synecology is the most appropriate term to describe the study of whole communities of organisms in ecology.
4.
The group interacting and interbreeding organism of the same species
Correct Answer
C. Population
Explanation
Population refers to a group of interacting and interbreeding organisms of the same species. It is a fundamental concept in ecology and biology, representing the individuals of a species that live in the same geographic area and have the potential to interbreed. A population can vary in size and can be influenced by factors such as birth rate, death rate, immigration, and emigration. Understanding populations is crucial for studying the dynamics and characteristics of species and their interactions with the environment.
5.
This is composed of different populations living together interacting as competitors, predatorand prey, or symbiotically.
Correct Answer
A. Community
Explanation
A community refers to a group of different populations of organisms living together in a specific area and interacting with each other in various ways. These interactions can include competition for resources, predation between species, or symbiotic relationships where different species benefit from each other. Therefore, the correct answer is community.
6.
The thin film on the surface of the earth in which all life exists is called
Correct Answer
B. BiospHere
Explanation
The biosphere refers to the thin film on the surface of the earth in which all life exists. It includes all living organisms, their interactions, and their environments. This term encompasses all ecosystems and habitats, including land, water, and the atmosphere. The biosphere is essential for supporting and sustaining life as we know it, making it the correct answer to the question.
7.
This area, composed of a community and the physical environment it occupies is called
Correct Answer
A. Ecosystem
Explanation
An ecosystem refers to a specific area where a community of living organisms, such as plants, animals, and microorganisms, interact with each other and with their physical environment. It encompasses both the biotic (living) and abiotic (non-living) components of the environment, including factors like climate, soil, water, and sunlight. This term is used to describe the complex relationships and interactions that occur within a particular area, highlighting the interdependence of organisms and their environment.
8.
Which of these sources of water is sediment rich
Correct Answer
B. River water
Explanation
River water is sediment rich because rivers flow through various terrains and pick up sediments along the way. These sediments can include soil, rocks, and other debris. As the river flows, it carries these sediments downstream, resulting in sediment-rich water. The amount of sediment in river water can vary depending on factors such as the speed of the river, the type of terrain it passes through, and the amount of rainfall in the area.
9.
These autotrophs are bacteria that obtain energy by oxidizing inorganic compounds such asammonia, nitrites, and sulfides, and they use this energy to synthesize carbohydrates.
Correct Answer
D. ChemautotropHs
Explanation
Chemautotrophs are bacteria that obtain energy by oxidizing inorganic compounds such as ammonia, nitrites, and sulfides. They use this energy to synthesize carbohydrates. This process is known as chemosynthesis. Unlike photoautotrophs, which use sunlight to produce energy, chemautotrophs rely on chemical reactions to obtain energy. Enzymes are proteins that catalyze chemical reactions, but they are not specifically related to chemautotrophs. Coliform is a group of bacteria used as indicators of water quality and is not related to the process of obtaining energy by oxidizing inorganic compounds.
10.
These autotrophs are photosynthesizers such as algae and green plants that produce most ofthe organic nutrients for the biosphere.
Correct Answer
B. pHotoautotropHs
Explanation
Photoautotrophs are organisms that can produce their own organic nutrients through the process of photosynthesis. They use sunlight as a source of energy to convert carbon dioxide and water into glucose and oxygen. Examples of photoautotrophs include algae and green plants. These organisms play a crucial role in the biosphere as they are responsible for producing the majority of organic nutrients that support other organisms in the ecosystem.
11.
They produce their own organic nutrients for themselves and other members of the community.
Correct Answer
A. AutotropHs
Explanation
Autotrophs are organisms that can produce their own organic nutrients through photosynthesis or chemosynthesis. This means they can convert inorganic substances into organic compounds, such as glucose, which they use as a source of energy. Autotrophs are able to sustain themselves and provide nutrients for other members of their community, making them self-sufficient and essential for the food chain.
12.
Which is not an abiotic component of the environment?
Correct Answer
B. Bacteria
Explanation
Bacteria is not an abiotic component of the environment because it is a living organism. Abiotic components refer to non-living factors in the environment, such as gases, light, and soil. Bacteria, on the other hand, are living organisms that play a crucial role in the environment as decomposers, producers, and agents of nutrient cycling.
13.
These are organisms that rely on detritus, the decomposing particles of organic matter, for food.
Correct Answer
B. Detritivores
Explanation
Detritivores are organisms that rely on detritus, the decomposing particles of organic matter, for food. They play a crucial role in the ecosystem by breaking down dead plant and animal material, recycling nutrients back into the environment. Unlike autotrophs, which can produce their own food through photosynthesis or chemosynthesis, detritivores obtain their energy by consuming detritus. Decomposers, on the other hand, are a broader category that includes detritivores but also includes microorganisms such as bacteria and fungi that break down organic matter. Heterotrophs are organisms that obtain their energy by consuming other organisms, but not specifically detritus.
14.
They are unable to produce food, are constantly looking for source of organic nutrients fromelsewhere.
Correct Answer
D. HeterotropHs
Explanation
Heterotrophs are organisms that are unable to produce their own food and rely on external sources of organic nutrients. They obtain their energy by consuming other organisms or organic matter. In contrast, autotrophs are able to produce their own food through photosynthesis or chemosynthesis. Detritivores feed on dead organic material, while decomposers break down organic matter and recycle nutrients back into the ecosystem. Therefore, the given statement aligns with the characteristics of heterotrophs.
15.
The living organisms are the____________components of an ecosystem.
Correct Answer
A. Biotic
Explanation
Living organisms are the biotic components of an ecosystem. Biotic factors refer to all the living organisms present in an ecosystem, including plants, animals, fungi, and microorganisms. These organisms interact with each other and their environment, playing essential roles in the functioning of the ecosystem. They contribute to energy flow and nutrient cycling, as well as provide habitats and resources for other organisms. Therefore, the correct answer is biotic.
16.
These are animals that feed both on plants and animals.
Correct Answer
B. Omnivores
Explanation
Omnivores are animals that have a diet consisting of both plants and animals. They are able to consume and digest both types of food sources. This allows them to have a more diverse diet compared to herbivores, which only eat plants, and detritivores, which feed on decaying organic matter. Omnivores have adaptations that enable them to obtain nutrients from both plant and animal sources, making them highly adaptable to different environments and food availability.
17.
They feed on other animals.
Correct Answer
D. Carnivores
Explanation
The given correct answer is "Carnivores." Carnivores are animals that primarily feed on other animals. They have adaptations such as sharp teeth and claws to help them catch and kill their prey. Unlike herbivores, which eat only plants, and omnivores, which eat both plants and animals, carnivores rely solely on consuming other animals for their nutrition.
18.
They are animals that graze directly on plants or algae.
Correct Answer
A. Herbivores
Explanation
Herbivores are animals that primarily feed on plants or algae. They obtain their nutrients and energy by consuming vegetation, such as leaves, stems, fruits, or flowers. Unlike carnivores, which feed on other animals, herbivores do not consume meat. Similarly, omnivores have a mixed diet of both plants and animals, while detritivores primarily feed on dead organic matter. Therefore, the correct answer is herbivores, as they directly graze on plants or algae.
19.
They perform a very valuable service by releasing inorganic substances that are taken up byplants once more.
Correct Answer
C. Decomposers
Explanation
Decomposers perform a very valuable service by releasing inorganic substances that are taken up by plants once more. They break down dead organic matter and waste materials, releasing nutrients back into the soil. This process, known as decomposition, is crucial for nutrient cycling in ecosystems. Without decomposers, organic matter would accumulate and nutrients would become locked up, preventing their availability to plants. Therefore, decomposers play a vital role in maintaining the balance and health of ecosystems.
20.
Earthworms and some beetles, termites, and maggots are all terrestrial .
Correct Answer
C. Detritivores
Explanation
Earthworms, beetles, termites, and maggots are classified as detritivores because they feed on dead organic matter, such as decaying plants and animals. They play a crucial role in the ecosystem by breaking down this organic matter and recycling nutrients back into the soil. Unlike herbivores, which only consume plant material, or carnivores, which primarily eat other animals, detritivores obtain their energy and nutrients from decomposing organic material. Therefore, the correct answer is detritivores.
21.
These ecosystems obtain their water from rivers and are often extremely seasonal
Correct Answer
A. Floodland
Explanation
Floodlands are ecosystems that obtain their water from rivers and are often extremely seasonal. During periods of heavy rain or snowmelt, rivers overflow their banks, flooding the surrounding land. This flooding brings nutrient-rich sediment and water, creating fertile conditions for plant growth. However, floodlands can also experience periods of drought when the river levels recede. These fluctuations in water availability make floodlands highly dynamic and support a diverse range of plant and animal species adapted to these seasonal changes.
22.
These are coastlines in the tropical and subtropical regions fringed with a strip of swamplandwhich is inundated every high tide with marine and brackish waters
Correct Answer
C. Marine wetland
Explanation
The term "marine wetland" accurately describes the strip of swampland along the coastlines in tropical and subtropical regions. This type of wetland is characterized by being inundated with marine and brackish waters during high tide. The term "floodland" does not specifically refer to coastal wetlands, while "bog" typically refers to freshwater wetlands. "Swamp and marsh" is a broader term that encompasses various types of wetlands, but "marine wetland" specifically highlights the presence of marine and brackish waters in this particular context.
23.
These ecosystems are found in areas of impeded drainage, where water runs off thesurrounding land and collects, or where groundwater lies close to the surface
Correct Answer
D. Swamp and marsh
Explanation
Swamps and marshes are the correct answer because they are both types of wetlands that are found in areas with impeded drainage. Swamps are typically found in forested areas and have slow-moving or stagnant water, while marshes are usually found in open areas and have more flowing water. Both ecosystems have water that collects or lies close to the surface, making them suitable habitats for various plant and animal species.
24.
These ecosystems receive water only from rainfall, not from streams, rivers or groundwater.
Correct Answer
B. Bog
Explanation
Bogs are characterized by their unique water source, which is solely rainfall. Unlike other wetland ecosystems that receive water from streams, rivers, or groundwater, bogs rely entirely on precipitation. This water scarcity leads to specific conditions in bogs, such as acidic and nutrient-poor soil, as well as the accumulation of organic material over time. Bogs are typically dominated by sphagnum mosses and have a high water table, creating a habitat for specialized plant and animal species.
25.
Lakes that are nutrient poor are describes as
Correct Answer
C. OligotropHic
Explanation
Lakes that are nutrient poor are described as oligotrophic. Oligotrophic lakes have low nutrient levels, particularly phosphorus and nitrogen, which limits the growth of plants and algae. As a result, these lakes have clear water and support a small population of fish and other organisms. The lack of nutrients in oligotrophic lakes is often due to factors such as low inputs of organic matter and limited water circulation.
26.
It is the ultimate source of energy for every ecosystem.
Correct Answer
D. Sun
Explanation
The sun is the ultimate source of energy for every ecosystem. It provides light and heat, which are essential for photosynthesis, the process by which plants convert sunlight into energy. This energy is then transferred through the food chain, from plants to herbivores to carnivores, sustaining the entire ecosystem. Unlike coal, wind, and water, which are secondary sources of energy, the sun is the primary source that fuels life on Earth.
27.
It is the term used to describe the amount of organic matter an ecosystem produces from solar energy within a given area during a given period of time.
Correct Answer
A. Primary consumers
Explanation
Primary consumers are organisms that directly consume producers (plants) in an ecosystem. They are the first level of consumers in a food chain or food web. While the given definition does not directly describe primary consumers, it does describe primary productivity. Primary productivity refers to the amount of organic matter (biomass) that is produced by producers through photosynthesis using solar energy in a given area and time period. Therefore, the correct answer is primary productivity.
28.
It is the total amount of organic matter produced by all autotrophs in an ecosystem, includingthat used by themselves.
Correct Answer
C. Gross primary productivity
Explanation
Gross primary productivity refers to the total amount of organic matter produced by all autotrophs in an ecosystem, including that used by themselves. This means it includes the energy used by the autotrophs for their own growth and maintenance, as well as the energy that is available to be passed on to the next trophic level. It is an important measure of the overall productivity and energy flow within an ecosystem.
29.
It is defined as the total amount of energy fixed per unit of time minus the amount of energyexpended by the metabolic activities of the photosynthetic organisms in the community.
Correct Answer
B. Net primary productivity
Explanation
Net primary productivity is the correct answer because it refers to the total amount of energy fixed per unit of time by photosynthetic organisms in an ecosystem, minus the energy expended through their own metabolic activities. It represents the energy available for consumption by herbivores and higher trophic levels in the ecosystem. Gross primary productivity, on the other hand, does not account for the energy used by the organisms themselves, while biomass and primary productivity are more general terms that do not specifically address the net energy balance.
30.
It is the net weight of all organisms living in an ecosystem, which, increases as a result of its net production.
Correct Answer
A. Biomass
Explanation
Biomass refers to the total weight of all living organisms in an ecosystem. It includes plants, animals, and microorganisms. The biomass increases as a result of net production, which is the difference between the energy gained through photosynthesis and the energy lost through respiration. This means that when the net primary productivity is positive, more energy is being produced through photosynthesis than is being consumed through respiration, leading to an increase in biomass. Therefore, biomass is a measure of the total amount of living matter in an ecosystem.
31.
It is defined as the rate of biomass accumulation by heterotrophs.
Correct Answer
B. Secondary productivity
Explanation
Secondary productivity refers to the rate at which heterotrophs, such as animals, accumulate biomass by consuming other organisms. This is in contrast to primary productivity, which is the rate at which autotrophs, such as plants, produce biomass through photosynthesis. Secondary productivity is an important measure of energy flow and ecosystem functioning, as it represents the energy available to higher trophic levels in a food chain. Therefore, the given answer is correct as it accurately defines secondary productivity as the rate of biomass accumulation by heterotrophs.
32.
These refer to the complicated feeding relationships that exist among organisms in naturalecosystem.
Correct Answer
B. Food webs
Explanation
Food webs refer to the complicated feeding relationships that exist among organisms in natural ecosystems. Unlike food chains, which only show a linear sequence of who eats whom, food webs depict a more complex network of interconnected feeding relationships. They illustrate the flow of energy and nutrients through various trophic levels, showing how different organisms are connected and dependent on each other for survival. Food webs are a more accurate representation of the intricacies of ecological interactions and provide a comprehensive understanding of the dynamics within an ecosystem.
33.
These are selected single-lane food relationships in a series among organisms
Correct Answer
A. Food chains
Explanation
Food chains are a linear representation of the transfer of energy and nutrients from one organism to another in an ecosystem. They show the flow of energy from producers (plants) to consumers (animals) and decomposers (bacteria and fungi). Each organism occupies a specific trophic level in the food chain, indicating its position in the transfer of energy. Food chains are a simplified version of food webs, which represent the interconnectedness of multiple food chains in an ecosystem. Niche refers to the role and position of an organism within its habitat, including its interactions with other species and its use of resources.
34.
They rely on producers directly or indirectly for a living.
Correct Answer
B. Predators
Explanation
Predators rely on producers directly or indirectly for a living because they feed on other animals, which in turn rely on producers for their food. Producers, such as plants, convert sunlight into energy through photosynthesis, providing the primary source of food for herbivores. Predators then consume these herbivores, obtaining their energy and nutrients indirectly from the producers. Therefore, predators depend on the existence and abundance of producers in the ecosystem to sustain their own survival and reproduction.
35.
They are those able to synthesize food for themselves.
Correct Answer
A. Producers
Explanation
Producers are organisms that are capable of synthesizing their own food through the process of photosynthesis or chemosynthesis. They convert sunlight, water, and carbon dioxide into glucose, which serves as their source of energy. This ability to produce their own food distinguishes them from other organisms in the ecosystem. Predators, decomposers, and consumers, on the other hand, rely on external sources of food and cannot synthesize it themselves. Therefore, the correct answer is producers.
36.
A consists of all the organisms that feed at a particular level in a food chain.
Correct Answer
B. TropHic level
Explanation
A trophic level refers to a specific position in a food chain where organisms obtain their energy and nutrients. It represents the feeding relationships between different organisms within an ecosystem. Each trophic level consists of organisms that occupy the same position in the food chain and share similar feeding habits. Therefore, the given statement accurately describes that a trophic level consists of all the organisms that feed at a particular level in a food chain.
37.
Secondary consumers belong to
Correct Answer
B. Third tropHic level
Explanation
Secondary consumers belong to the third trophic level because they obtain their energy by consuming primary consumers (herbivores) that feed on plants. In a food chain, primary producers (plants) occupy the first trophic level as they convert sunlight into energy through photosynthesis. Primary consumers (herbivores) that eat plants are at the second trophic level. Secondary consumers, such as carnivores or omnivores, feed on primary consumers and occupy the third trophic level. They are one step higher in the food chain and obtain energy from the organisms at the lower trophic levels.
38.
Primary consumers second belong to
Correct Answer
D. First tropHic level
Explanation
Primary consumers belong to the first trophic level because they are the organisms that directly consume producers (plants) for energy. They are herbivores that obtain their energy by feeding on plants and are therefore at the lowest level of the food chain.
39.
Primary producers belong to
Correct Answer
D. First tropHic level
Explanation
Primary producers belong to the first trophic level because they are organisms that convert sunlight energy into chemical energy through photosynthesis. They are at the base of the food chain and provide energy for all other trophic levels. This means that they are the primary source of food and energy for other organisms in the ecosystem.
40.
It is a process by which radiative energy leaving a planetary surface is absorbed by someatmospheric gases.
Correct Answer
D. Greenhouse Effect
Explanation
The given correct answer is "Greenhouse Effect". The explanation for this answer is that the greenhouse effect is a process by which radiative energy leaving a planetary surface is absorbed by some atmospheric gases. This process leads to the trapping of heat in the atmosphere, resulting in an increase in the temperature of the planet. The greenhouse effect is essential for maintaining the Earth's temperature and making it habitable for life.
41.
Which of these does not belong to the Greenhouse gases
Correct Answer
D. Oxygen
Explanation
Oxygen does not belong to the greenhouse gases. Greenhouse gases are gases that trap heat in the Earth's atmosphere, contributing to the greenhouse effect and global warming. Oxygen is not considered a greenhouse gas because it does not have the ability to trap heat like water vapor, carbon dioxide, and methane do. Oxygen is a vital component of the Earth's atmosphere, necessary for supporting life, but it does not have the same warming effect as greenhouse gases.
42.
All ecological space that shares the same species, climate, animals, and plants is called
Correct Answer
B. Biome
Explanation
A biome refers to a large geographical area with similar climate, plants, animals, and species. It encompasses various habitats and ecosystems within it. This term is used to categorize and study different regions on Earth based on their distinct characteristics and the organisms that inhabit them. Therefore, the correct answer is Biome.
43.
In this biome the aggravating factor is the water: the precipitations do not arrive at 15 inchesper year, whereas the annual average temperature is of 86 F.
Correct Answer
D. Tropical rainforest
Explanation
The given information states that the biome in question has a low amount of precipitation (less than 15 inches per year) and a high average temperature (86 F). These conditions are characteristic of a tropical rainforest biome. Tropical rainforests are known for their high temperatures and abundant rainfall, with an average of 80-400 inches of precipitation per year. Therefore, based on the information provided, the correct answer is tropical rainforest.
44.
With their multiple variety of vegetal species and animals, these are the most productive biomes of the Earth and those of greatest biodiversity.
Correct Answer
D. Tropical rainforests
Explanation
Tropical rainforests are considered the most productive biomes on Earth due to their high levels of rainfall and sunlight, which support the growth of a wide variety of vegetal species. This abundance of plant life then supports a diverse range of animals, making tropical rainforests the biomes with the greatest biodiversity.
45.
It is a description of where an organism is found
Correct Answer
C. Habitat
Explanation
Habitat refers to the specific place or type of environment where an organism is found. It encompasses the physical factors such as temperature, humidity, and resources like food and water, as well as the biotic factors like other organisms that may interact with the organism. It is different from environment, which is a broader term encompassing all the surroundings, and biome, which refers to large geographical areas with distinct climate and vegetation. Niche, on the other hand, refers to the role and position of an organism within its habitat, including its interactions with other species and its use of resources.
46.
It is a complete description of how organism relates to its physical and biological environment
Correct Answer
D. Niche
Explanation
A niche refers to the specific role or position that an organism occupies within its ecosystem. It encompasses the organism's interactions with both its physical and biological environment, including its habitat, available resources, and interactions with other species. The correct answer states that a niche is a complete description of how an organism relates to its environment, which accurately reflects the concept of a niche as the specific ecological role an organism plays in its ecosystem.
47.
It was considered as a subset of the general evolutionary relationships between species incommunities
Correct Answer
C. Co-evolution
Explanation
Co-evolution refers to the process in which two or more species influence each other's evolutionary paths over time. In this context, the statement suggests that co-evolution was seen as a component of the broader evolutionary relationships between species in communities. This implies that co-evolution was recognized as a significant factor in shaping the interactions and adaptations between species within a community, highlighting the interconnectedness and interdependence of different organisms in their evolutionary journeys.
48.
It is used to describe any close relationship between two species
Correct Answer
A. Symbiosis
Explanation
Symbiosis is the correct answer because it is a term used to describe any close relationship between two species. Symbiotic relationships can be mutualistic, where both species benefit, or they can be antagonistic, where one species benefits at the expense of the other. Co-evolution is a process that occurs in symbiotic relationships where two species evolve in response to each other over time. Therefore, symbiosis encompasses all types of close relationships between species.
49.
It is used to describe the relationship if both species benefit from each other.
Correct Answer
B. Mutualism
Explanation
Mutualism is the correct answer because it refers to a type of symbiotic relationship where both species involved benefit from each other. In mutualism, both species provide resources or services that the other species needs, resulting in a mutually beneficial relationship. This type of interaction is commonly observed in nature, such as the relationship between bees and flowering plants, where bees obtain nectar and pollen for food while aiding in pollination for the plants.
50.
It refers to the relationship usually produce an arms race of chemical and mechanical attack and defense mechanism
Correct Answer
D. Antagonistic Co-evolution
Explanation
Antagonistic co-evolution refers to a relationship between species where they engage in a constant cycle of attack and defense mechanisms. This can lead to an arms race, where each species evolves traits to outcompete the other. In this scenario, chemical and mechanical methods are used by the species to defend against and attack each other. This type of co-evolution is often seen in predator-prey relationships or in interactions between parasites and their hosts.