Groups of different species that live together in a defined are make up a(an) a. population. b. community. c. ecosystem. d. biosphere.

A group of individuals belonging to a single species that lives together in a defined area is termed a(an) (A) population (B) ecosystem (C) community (D) biome (E) biosphere

The total mass of living tissue at each trophic level can be shown in a: A. pyramid of numbers. B. biogeochemical cycle. C. pyramid of biomass. D. limiting nutrient.

Autotrophs are organisms that a. rely on other organisms for their energy and food supply. b. consume plant and animal remains and other dead matter. c. use energy they take in from the environment to convert inorganic molecules. d. obtain energy by eating only plants.

The total amount of living tissue at each trophic level in an ecosystem can be shown in a(n) a. pyramid of energy. b. pyramid of numbers. c. pyramid of biomass. d. biogeochemical cycle.

Which of these electron transitions correspond to absorption of energy and which to emission?

n = 2 to n = 4,

While grazing, a buffalo stirs up insects. These insects are eaten by cattle egrets. What type of interaction does the cattle egret exhibit with the buffalo?

Find the length of

$$\overline { A B }$$

and the midpoint of

$$\overline { A B }$$

. Round the length of

$$\overline { A B }$$

to the nearest tenth. A(8, 11) and B(-5, 2)

All members of a species that live in the same area at the same time make up a(an)

a. population.

b. species.

c. community.

d. biome.

e. ecosystem.

A major regional or global community of organisms is a(n) _______________

Write a formula for finding the perimeter of a square. Use your formula to find the perimeter of a square with side length of 0.5 inch.

Exotic species are especially threatening to what kind of ecosystem? a. deserts, b. marine ecosystems, c. islands, d. tropical forests.

In the nitrogen cycle, bacteria that live on the roots of plants a. break down nitrogen compounds b. denitrify nitrogen compounds c. change nitrogen gas into plant proteins d. change nitrogen gas into ammonia

Taiga is a synonym for the a. boreal forest. b. temperate woodland. c. tropical dry forest. d. desert.