Question

 

1) Which of the following would be an organism at the base of a detrital food web?

Group of answer choices

a)beetle

b)fox

c)salamander

d)hawk

 

2) Which of the following is necessary to maintain a balanced (stable) ecosystem?

Group of answer choices

a)All of the answer choices describe necessary factors for maintaining a balanced ecosystem.

b)Matter (i.e., elements) has to cycle.

c)There must be an outside energy source.

d)Energy must be allowed to flow through the ecosystem.

 

3)The primary producers in an ecosystems are also called

Group of answer choices

a)autotrophs.

b)herbivores.

c)consumers.

d)carnivores

 

4)Which of the following is a biotic factor in an ecosystem?

Group of answer choices

a)trees

b)inorganic nutrients

c)water availability

d)temperature

Answer 1

1. Correct option is (a) Beetle

The base of the detrital food web consists of decomposers or detrivores like beetle.

Hawk is on the top of the web and fox lies near the middle. Beetles are eaten by salamander or shrew, so beetles occupies the base of the detrital food web.

2. Correct option is (a)

For a balanced ecosystem, producers need energy from outside (Sun) to produce food, elements must cycle in an ecosystem and energy must flow from one trophic level to another in an ecosystem. All these keeps a balance in an ecosystem.

3. Correct option is (a) Autotrophs

The primary producers in an ecosystem are plants or producers or autrotrophs. Each and every living being directly or indirectly depends on the autotrophs for food. They acquire first trophic level in an ecosystem. These are eaten by herbivores which is second trophic level of an ecosystem. Herbivores are consumed by carnivores. Herbivores and carnivores both come under consumers.

4. Correct option is (a) Trees

Biotic factors are the living factors where as abiotic factors are the non-living factors of the ecosystem. Trees are the living beings so they come under biotic factors. Inorganic nutrients, water and temperature are abiotic factors of the ecosystem.