A Short Quiz Based On Various Biological Systems!
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Answer all questions according to what we read in the textbook.
Questions and Answers
- 1.
Where is the "O layer" or the "O horizon" located in soil?
- A.
Top layer
- B.
Middle layer
- C.
Bottom layer
Correct Answer
A. Top layerExplanation
The "O layer" or "O horizon" is located in the top layer of soil. This layer consists of organic matter such as decomposed leaves, plant material, and animal waste. It is the most superficial layer of soil and plays a crucial role in nutrient cycling and soil fertility. The organic matter in the O layer helps retain moisture, improves soil structure, and provides a favorable environment for soil organisms.Rate this question:
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- 2.
Work by what type of organism is required before plants can get the nutrients in soil?
- A.
Producer
- B.
Consumer
- C.
Decomposer
- D.
Herbivore
Correct Answer
C. DecomposerExplanation
Before plants can get the nutrients in the soil, the work of decomposers is required. Decomposers are organisms that break down dead organic matter, such as dead plants and animals, into simpler substances. They play a crucial role in the nutrient cycle by breaking down complex organic compounds into inorganic nutrients that can be absorbed by plants. Without decomposers, organic matter would accumulate and nutrients would not be released back into the soil for plants to use. Therefore, the work of decomposers is necessary for plants to obtain the nutrients they need for growth.Rate this question:
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- 3.
Potash is...
- A.
Nitrogen
- B.
Potassium
- C.
Phosphorous
- D.
Potatoes
Correct Answer
B. PotassiumExplanation
Potash is a term used to refer to potassium compounds that are commonly found in fertilizers. Potassium is an essential nutrient for plant growth and is involved in various physiological processes, such as water and nutrient uptake, enzyme activation, and photosynthesis. Therefore, the correct answer is potassium.Rate this question:
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- 4.
Acidic soil will have a ______ pH number.
- A.
Low
- B.
High
Correct Answer
A. LowExplanation
Acidic soil will have a low pH number because pH is a measure of the acidity or alkalinity of a substance, with values ranging from 0 to 14. A pH value below 7 indicates acidity, and the lower the pH number, the more acidic the substance is. Therefore, acidic soil will have a low pH number.Rate this question:
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- 5.
By products of cellular respiration:
- A.
Heat
- B.
Carbon dioxide
- C.
Oxygen
- D.
Stable body temperature
- E.
Sweat
- F.
Breathing more
Correct Answer(s)
A. Heat
B. Carbon dioxideExplanation
The byproducts of cellular respiration are heat and carbon dioxide. During cellular respiration, glucose is broken down to produce energy in the form of ATP. This process releases heat as a byproduct. Additionally, carbon dioxide is produced as a waste product and is expelled from the body through respiration.Rate this question:
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- 6.
In order for something to adapt rapidly, it needs to have a....
- A.
Short life span
- B.
Quick rate of reproduction
- C.
Genetic disease
- D.
Set of skills
Correct Answer
B. Quick rate of reproductionExplanation
In order for something to adapt rapidly, it needs to have a quick rate of reproduction. This is because a quick rate of reproduction allows for more opportunities for genetic variation and mutations to occur, which are the basis for adaptation. When individuals reproduce quickly, there is a higher chance that beneficial traits will be passed on to the next generation, allowing for faster adaptation to changing environments. Therefore, a quick rate of reproduction is essential for rapid adaptation.Rate this question:
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- 7.
(According to the textbook) Where do we get all our energy, directly or indirectly?
- A.
Stars
- B.
Plants
- C.
Animals
- D.
Chemosynthesis
Correct Answer
B. PlantsExplanation
Plants are the primary source of energy in most ecosystems. Through the process of photosynthesis, plants convert sunlight into chemical energy in the form of glucose. This energy is then passed on to animals that consume plants, either directly or indirectly. Therefore, plants are responsible for providing energy to both animals and other organisms in the food chain.Rate this question:
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- 8.
Organic molecules that are needed in small amounts by higher animals to perform specific functions.
- A.
Vitamins
- B.
Minerals
- C.
Calories
- D.
Fats
Correct Answer
A. VitaminsExplanation
Vitamins are organic molecules that are essential for the proper functioning of the body. They are required in small amounts by higher animals to perform specific functions. Unlike minerals, which are inorganic substances, vitamins are organic compounds that are necessary for various bodily processes such as metabolism, growth, and immunity. They cannot be synthesized by the body in sufficient quantities, so they need to be obtained through the diet. Therefore, the correct answer is vitamins.Rate this question:
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- 9.
Proteins are broken down into simpler building blocks called
- A.
Amino acids
- B.
Calories
- C.
Respiration
- D.
Nutrients
Correct Answer
A. Amino acidsExplanation
Proteins are complex molecules made up of long chains of amino acids. When proteins are broken down, they are broken into their individual amino acid components. These amino acids are then used by the body for various purposes, such as building and repairing tissues, producing enzymes and hormones, and supporting the immune system. Therefore, the correct answer is amino acids.Rate this question:
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- 10.
What is genetic variability?
- A.
Raw material of natural selection
- B.
Differences between species
- C.
Cause of mutations
- D.
Ecological habitat
Correct Answer(s)
A. Raw material of natural selection
B. Differences between speciesExplanation
genetic variability is not a cause of mutations; mutations are caused by other factors such as radiation and incorrect DNA copying.Rate this question:
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- 11.
If a farmer doesn't want to use pesticides, he or she can use
- A.
Principles of diversity
- B.
Mono-culture crops
- C.
Integrated pest management
- D.
Crop rotation
Correct Answer(s)
A. Principles of diversity
C. Integrated pest managementExplanation
Mono-culture crops are a bad idea; you want a variety so that if one crop gets destroyed by pests, the others will survive. Crop rotation simply refers to planting different crops in different years; it has nothing to do with pests.Rate this question:
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- 12.
What are the 3 types of organisms identified at the beginning of section 6.4 (this was the first paragraph we outlined yesterday)
- A.
Producers
- B.
Consumers
- C.
Decomposers
- D.
Herbivores
- E.
Omnivores
- F.
Carnivores
Correct Answer(s)
A. Producers
B. Consumers
C. DecomposersExplanation
The correct answer is producers, consumers, and decomposers. These three types of organisms were identified at the beginning of section 6.4. Producers are organisms that can produce their own food through photosynthesis or chemosynthesis. Consumers are organisms that obtain their energy by consuming other organisms. Decomposers are organisms that break down dead organic matter and recycle nutrients back into the ecosystem.Rate this question:
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- 13.
What do fats do for the cell?
- A.
Help build cell membrane
- B.
Help store water
- C.
Help with movement
- D.
Help create DNA
Correct Answer
A. Help build cell membraneExplanation
Fats play a crucial role in building the cell membrane. The cell membrane is composed of a lipid bilayer, which is made up of phospholipids and cholesterol. Fats, also known as lipids, provide structural support to the cell membrane and help maintain its integrity. They help in regulating the movement of molecules in and out of the cell, providing a barrier and protection to the cell's internal components. Additionally, fats also serve as a source of energy for the cell and aid in the absorption of fat-soluble vitamins.Rate this question:
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- 14.
Chemical reactions that take place as food is broken down is called
- A.
Metabolism
- B.
Autotrophism
- C.
Enzymes
- D.
Phosphorous
Correct Answer
A. MetabolismExplanation
Metabolism refers to the chemical reactions that occur in the body as food is broken down and transformed into energy. It involves various processes such as digestion, absorption, and the conversion of nutrients into usable forms. Autotrophism refers to the ability of organisms to produce their own food, enzymes are proteins that catalyze biochemical reactions, and phosphorous is a chemical element. Therefore, metabolism is the correct answer as it specifically relates to the breakdown of food and the subsequent chemical reactions involved.Rate this question:
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- 15.
How does a plant get nutrients such as nitrogen and potassium?
- A.
Photosynthesis
- B.
The sun
- C.
Soil
- D.
Water
- E.
The air
Correct Answer
C. SoilExplanation
Plants obtain nutrients such as nitrogen and potassium from the soil. The roots of the plant absorb water and dissolved nutrients from the soil through a process called osmosis. These nutrients are essential for the growth and development of the plant. While photosynthesis and sunlight are necessary for plants to produce their own food, they do not directly provide nutrients like nitrogen and potassium. Similarly, while water and air are also important for plant growth, they do not specifically provide nutrients like soil does.Rate this question:
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- 16.
What was a real-world example of variability?
- A.
Farmers using pesticides on insects
- B.
Wolves hunting for animals in the snow
- C.
Plants getting nutrients from the soil
- D.
Testing for the presence of nitrogen
Correct Answer
A. Farmers using pesticides on insectsExplanation
A real-world example of variability is farmers using pesticides on insects. This is because the effectiveness of pesticides can vary depending on factors such as the type of pesticide used, the specific insect species being targeted, and environmental conditions. Some insects may be more resistant to certain pesticides, leading to variability in the outcome of pest control efforts. Additionally, factors like weather conditions and application techniques can also contribute to variability in the efficacy of pesticides.Rate this question:
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- 17.
What does the "O" stand for in "O layer"?
- A.
Organic
- B.
Oxygen
- C.
Ontological
- D.
Organized
Correct Answer
A. OrganicExplanation
The "O" in "O layer" stands for organic. This term refers to a layer in the atmosphere that contains a high concentration of ozone molecules. Ozone is an organic molecule that consists of three oxygen atoms bonded together. The O layer plays a crucial role in protecting the Earth's surface from harmful ultraviolet radiation from the sun.Rate this question:
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Jun 26, 2023Quiz Edited by
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Oct 26, 2012Quiz Created by
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