1.
A plant is...
Correct Answer
D. A and C
Explanation
A plant is an autotroph because it is able to produce its own food through photosynthesis. It is also a primary producer because it occupies the lowest trophic level in a food chain and provides energy to other organisms.
2.
Autotrophs...
Correct Answer
D. All of the above
Explanation
Autotrophs are organisms that can produce their own food through photosynthesis or chemosynthesis. They are the base of the food chain as they provide energy and nutrients for other organisms. Autotrophs are also known as primary producers because they convert sunlight or inorganic compounds into organic matter. Therefore, the correct answer is "all of the above" as autotrophs fulfill all these roles in an ecosystem.
3.
A lion that eats a zebra that ate grass is a...
Correct Answer
C. Secondary consumer
Explanation
A lion that eats a zebra that ate grass is considered a secondary consumer. This is because the lion is consuming another animal (zebra) that is a primary consumer, as it directly consumes the grass. Secondary consumers are organisms that feed on primary consumers, and in this case, the lion is obtaining energy by consuming the zebra.
4.
A bear that eats a fish that ate bugs that ate algae is a...
Correct Answer
D. Tertiary consumer
Explanation
A bear that eats a fish that ate bugs that ate algae is a tertiary consumer. This is because it is at the highest level in the food chain, feeding on organisms that are themselves consumers. The algae is the primary producer, the bugs are the primary consumers, the fish is the secondary consumer, and the bear is the tertiary consumer.
5.
A person who eats a chicken that ate grain is a...
Correct Answer
C. Secondary consumer
Explanation
A person who eats a chicken that ate grain is a secondary consumer. This is because the person is consuming a consumer (the chicken) that obtains its energy from consuming a primary producer (grain). In the food chain, primary producers (such as plants) convert sunlight into energy through photosynthesis. Primary consumers (such as herbivores) then eat the primary producers. Secondary consumers (such as carnivores or omnivores) then eat the primary consumers. Therefore, the person in this scenario is considered a secondary consumer.
6.
Primary consumers eat...
Correct Answer
A. Primary producers
Explanation
Primary consumers eat primary producers. Primary producers are organisms, such as plants, that are capable of producing their own food through photosynthesis. Primary consumers, also known as herbivores, feed directly on these primary producers to obtain energy. They play a crucial role in food chains and ecosystems by transferring energy from the sun to higher trophic levels.
7.
Secondary consumers eat...
Correct Answer
B. Primary consumers
Explanation
Secondary consumers are organisms that feed on primary consumers. Primary consumers, also known as herbivores, are organisms that directly consume primary producers, such as plants. Therefore, it can be inferred that secondary consumers eat primary consumers. Tertiary consumers, on the other hand, eat secondary consumers, and quaternary consumers eat tertiary consumers.
8.
Tertiary consumers eat...
Correct Answer
C. Secondary consumers
Explanation
Tertiary consumers are organisms that feed on secondary consumers. They are at the top of the food chain and typically carnivorous. Since secondary consumers are the primary food source for tertiary consumers, it can be inferred that tertiary consumers eat secondary consumers.
9.
Quaternary consumers eat...
Correct Answer
D. Tertiary consumers
Explanation
Quaternary consumers are organisms that feed on tertiary consumers, which are organisms that eat secondary consumers. This means that quaternary consumers are at the top of the food chain, feeding on organisms that are already higher up in the chain. They do not eat primary producers or primary consumers, as they are further down the chain. Therefore, the correct answer is tertiary consumers.
10.
What is a Heterotroph?
Correct Answer
E. None of the above
Explanation
A heterotroph is an organism that cannot produce its own food and relies on consuming other organisms for energy. It is not an autotroph because autotrophs are able to produce their own food through photosynthesis or chemosynthesis. It is also not a primary producer because primary producers are autotrophs that convert sunlight into energy. Therefore, the correct answer is "none of the above".
11.
A cow that grazes on grass out in a pasture is considered a...
Correct Answer
D. All of the above
Explanation
A cow that grazes on grass out in a pasture is considered a primary consumer because it consumes plants directly. It is also a heterotroph because it obtains its energy from consuming other organisms. Additionally, it is an herbivore because it feeds exclusively on plants. Therefore, the correct answer is "all of the above" as all the given options accurately describe a cow that grazes on grass in a pasture.
12.
If a person eats a salad, what is the person acting as?
Correct Answer
B. A primary consumer
Explanation
When a person eats a salad, they are consuming plants, which makes them a primary consumer. Primary consumers are organisms that directly feed on producers, such as plants, to obtain energy. In this scenario, the person is obtaining energy from the plants in the salad by consuming them, making them a primary consumer.
13.
If a person eats a steak (from a cow), the person is acting as...
Correct Answer
C. A secondary consumer
Explanation
A person eating a steak from a cow is considered a secondary consumer. In an ecosystem, primary producers are plants that produce their own food through photosynthesis. Primary consumers are herbivores that eat plants, while secondary consumers are carnivores that eat herbivores. Since the person is consuming meat from a cow, which is a herbivore, they are classified as a secondary consumer.
14.
If a person eats a salmon (that ate smaller fish that ate algae), the person is acting as...
Correct Answer
C. A secondary consumer
Explanation
If a person eats a salmon that ate smaller fish that ate algae, the person is acting as a secondary consumer. This is because the person is consuming a consumer (salmon) that obtains its energy by consuming other organisms (smaller fish) that in turn obtain their energy by consuming producers (algae). As a secondary consumer, the person is one step higher in the food chain, feeding on organisms that are themselves consumers.
15.
As nutritional energy passes through the food chain, energy...
Correct Answer
B. Is gained
Explanation
As nutritional energy passes through the food chain, it is gained by organisms at each trophic level. This is because organisms obtain energy by consuming other organisms, and they are able to extract and utilize the energy stored in the food they consume. Therefore, as energy moves up the food chain, it is gained by each successive organism.