$$6CO_2 + 6H_2O + \text{Energy from sunlight} \rightarrow C_6H_{12}O_6$ + 6O_2$$

Question 1

Which of the following best describes the sequence of energy flow in the first image (corn → mouse → snake → owl)?

Accepted Answer

A grazing food chain, where energy flows from producers to herbivores and then to carnivores.

Question 2

In the second image, which organism acts as a decomposer in the food chain: Dead leaves → Woodlouse → Blackbird?

Accepted Answer

Woodlouse

Question 3

Based on the third image, which of the following statements about food webs is correct?

Accepted Answer

Food webs illustrate complex and interconnected feeding relationships among organisms.

Question 4

Which of the following equations correctly represents the process carried out by the producers in the first and third images?

Accepted Answer

$$6CO_2 + 6H_2O + 	ext{Energy from sunlight} ightarrow C_6H_{12}O_6$ + 6O_2$$

Question 5

If the population of snakes in the first image decreases significantly, what is the most likely immediate effect on the mouse population?

Accepted Answer

The mouse population will increase due to reduced predation.

Question 6

Which of the following best describes the role of the owl in the first image?

Accepted Answer

Tertiary consumer

Question 7

In the context of the third image, what would happen if all the plants were removed from the ecosystem?

Accepted Answer

All consumers would eventually be affected due to the loss of the primary energy source.

Question 8

Which of the following is an example of a saprophage based on the food chains shown?

Accepted Answer

Woodlouse

Question 9

Which of the following best explains why food webs are more stable than simple food chains?

Accepted Answer

Food webs allow for multiple energy pathways, so the loss of one species does not collapse the entire system.

Question 10

Which of the following is a correct sequence of the levels of ecological organization from smallest to largest?

Accepted Answer

Organism → Population → Community → Ecosystem → Biome → Biosphere

Question 11

Which of the following is NOT an ecosystem service provided by the ecosystems shown in the images?

Accepted Answer

Production of synthetic chemicals

Question 12

Which of the following elements is NOT one of the 16 essential elements for life listed in the study materials?

Accepted Answer

Sodium (Na)

Question 13

Which of the following best describes the process of nutrient cycling in an ecosystem?

Accepted Answer

Nutrients are transformed and recycled within the Earth's closed system.

Question 14

In the first image, which organism is the primary consumer?

Accepted Answer

Mouse

Question 15

Which of the following best describes the difference between a food chain and a food web?

Accepted Answer

A food chain shows a single linear pathway, while a food web shows multiple interconnected pathways.

Question 16

Which of the following is an abiotic component of an ecosystem?

Accepted Answer

Water

Question 17

If a pesticide eliminated all grasshoppers in the third image, which group would be affected first?

Accepted Answer

Primary consumers that feed on grasshoppers

Question 18

Which of the following is a supporting ecosystem service?

Accepted Answer

Nutrient cycling

Question 19

Which of the following best describes the role of decomposers in an ecosystem?

Accepted Answer

They break down dead organic matter, recycling nutrients back into the ecosystem.

Question 20

Which of the following is an example of a regulating ecosystem service?

Accepted Answer

Pollination of crops by insects

The Biosphere and Ecosystem: Structure, Function, and Interactions

Study Guide - Practice Questions