Multiple Choice Tests

1. Biotic factors include:

a) gas composition of the atmosphere;

b) temperature;

c) soil salinity;

d) none of the above.

2. An environmental factor that goes beyond endurance is called:

a) stimulating;

b) limiting;

c) abiotic;

d) anthropogenic;

3. Which of the factors will be limiting at great ocean depths for brown algae?

a) oxygen content;

b) the amount of carbon dioxide;

c) illumination;

d) water temperature.

4. The interaction of sea anemone and hermit crab is called:

a) symbiosis;

b) parasitism;

c) commensalism;

d) competition.

5. Competition is the relationship between:

a) predators and prey;

b) species with similar needs;

c) parasites and hosts;

d) living organisms and abiotic factors.

6. As a result of the predator-prey relationship:

a) there is an extinction of the population of the victim;

b) the population of the prey decreases;

c) the size of the predator population increases sharply;

d) there is an ecological separation of species.

7. The relationship between the parasite and the host is that the parasite:

a) does not harm the owner;

b) benefits the owner;

c) harms, but usually does not lead to the death of the host;

d) leads to the death of the host.

8. Which of the following examples shows the competition of organisms?

a) dodder growing on other plants;

b) colza growing in a wheat field;

c) nodule bacteria on the roots of legumes;

d) none of the above.

9. Which type of relationship leads to the complete extermination of another species?

a) predation;

b) parasitism;

c) competition;

d) none of the above.

10. Biogeocenosis includes:

a) only plants and the environment;

b) only the environment in which organisms exist;

c) organisms and environment;

d) there is no correct answer.

11. Which of the listed organisms is a consumer in the forest ecosystem?

a) hares;

b) mushrooms;

c) bacteria;

d) plants.

12. The main role in the mineralization of organic residues belongs to:

a) reducers;

b) consumers;

c) producers;

d) all answers are correct.

13. The main energy suppliers in the pine forest are:

a) bacteria;

b) pines;

c) proteins;

d) insects.

14. In what direction are food and energy connections carried out?

a) consumers → producers → decomposers;

b) decomposers → consumers → producers;

c) producers → consumers → decomposers;

d) producers → consumers decomposers.

15. The productivity of an ecosystem is called:

a) its total biomass;

b) increase in biomass per unit of time;

c) total biomass of producers;

d) total biomass of consumers.

Multiple Choice Tests

1. Give examples of symbiotic relationships.

A) between birches and tinder fungi.

B) between a rhinoceros and bullock birds.

C) between sticky fish and sharks.

D) between hedgehogs and shrews.

D) between sea anemone and hermit crab.

E) between tits and mice in the same forest.

2. Why is agrocenosis not a sustainable ecosystem?

A) it has no food chains.

B) it has short food chains.

C) it does not contain decomposers.

D) there are no consumers in it.

D) it is dominated by producers of the same species.

E) it has a small number of species.


1. Divide examples of environmental factors into abiotic and biotic.

Examples environmental factors
A) the chemical composition of water. B) the diversity of plankton. C) soil moisture and temperature. D) the presence of nodule bacteria on the roots of legumes. D) the speed of water flow. E) soil salinity. 1) abiotic factors; 2) biotic factors.

2. Establish a correspondence between the function of the organism and the group to which it belongs.

Function group of organisms
A) autotrophic organisms. B) produce primary organic matter in the process of photosynthesis. C) heterotrophic organisms. D) provide aerobic respiration. E) consume organic substances in food chains and decomposition chains. E) assimilate the energy contained in the consumed nutrients. 1) producers; 2) consumers.

5 . Set sequence

1. Establish a sequence of steps to change communities.

A) closure of birch crowns and its impact on the environment.

B) the formation of abandoned arable land.

C) the displacement of light-loving plants from the herbage by shade-tolerant ones.

D) spruce catches up with birch in growth and is included in the first tier.

D) germination of birch seeds.

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