Aimbio

1.

1 point

Green plants are

herbivores.

producers.

omnivores.

consumers.

2.

1 point

What is the original source of almost all the energy in most ecosystems?

water

sunlight

carbohydrates

carbon

3.

1 point

The simplest grouping of more than one kind of organism in the biosphere is a(an)

ecosystem.

community.

species.

population.

4.

1 point

What is the process by which bacteria convert nitrogen gas in the air to ammonia?

excretion

decomposition

denitrification

nitrogen fixation

5.

1 point

Organisms that obtain nutrients by breaking down dead and decaying plants and animals are called

producers.

autotrophs.

omnivores.

decomposers.

6.

1 point

A snake that eats a frog that has eaten an insect that fed on a plant is a

first-level producer.

second-level producer.

third-level consumer.

first-level consumer.

7.

1 point

Nitrogen fixation is carried out primarily by

humans.

bacteria.

plants.

consumers.

8.

1 point

Which of the following organisms does NOT require sunlight to live?

chemosynthetic bacteria

trees

algae

photosynthetic bacteria

9.

1 point

Only 10 percent of the energy stored in an organism can be passed on to the next trophic level. Of the remaining energy, some is used for the organism’s life processes, and the rest is

stored as fat.

used in reproduction.

stored as body tissue.

eliminated as heat.

10.

1 point

What animals eat both producers and consumers?

herbivores

autotrophs

chemotrophs

omnivores

11.

1 point

The branch of biology dealing with interactions among organisms and between organisms and their environment is called

modeling.

economy.

ecology.

recycling.

12.

1 point

An organism that uses energy to produce its own food supply from inorganic compounds is called a(an)

heterotroph.

autotroph.

consumer.

detritivore.

13.

1 point

The algae at the beginning of the aquatic food chain are called

heterotrophs.

consumers.

decomposers.

producers.

14.

1 point

All of the members of a particular species that live in the same area are called a(an)

community.

ecosystem.

biome.

population.

15.

1 point

All the interconnected feeding relationships in an ecosystem make up a food

network.

web.

interaction.

chain.

16.

1 point

Which of the following descriptions about the organization of an ecosystem is correct?

Communities make up species, which make up populations.

Populations make up species, which make up communities.

Species make up communities, which make up populations.

Species are grouped in populations, which make up communities.

17.

1 point

An organism that cannot make its own food is called a(an)

autotroph.

chemotroph.

heterotroph.

producer.

18.

1 point

What is an organism that feeds only on plants called?

detritivore

herbivore

carnivore

omnivore

19.

1 point

The repeated movement of water between Earth’s surface and the atmosphere is called

precipitation.

the water cycle.

evaporation.

the condensation cycle.

20.

1 point

What is the combined portions of Earth called in which all living things exist?

community

biome

biosphere

ecosystem