Ecology Semester 2 Exam

When the birthrate in a population becomes higher than the death rate, the pop. growth rate

What 2 organisms are most crucial in an ecosystem?

What happened to human population during the Industrial revolution? Why?

DDT was used to

As DDT moves up the trophic levels in food chains, its concentration

What is DDT? What does it do?

What happened when the starfish was removed from the tidepool ecosystem?

Being in a large group decreases your chances of being captured and eaten. This is known as...

_Biodiversity is valuable in the biosphere because it

How is this picture like an ecosystem?

The movement of organisms into a given area from another area is called

The various growth phases through which most populations go are represented by a(an)

What do microplastics do to ecosystem?

The sum total of the genetically based variety of living organisms in the biosphere is called

When individuals in a pop. reproduce at a constant rate, it produces a pattern of growth called

One of the goals of conservation biology is to

what is biomagnification?

All of the following are threats to biodiversity EXCEPT

Demography is the scientific study of

what is bioaccumulation?

What happened when wolves were reintroduced to Yellowstone?

Biodiversity is important to human society because it

Which is stronger- a food web or food chain? Why?

What is the MAIN reason human population has increased dramatically this century?

practice of killing or trapping any animal

Each of the following is a density-dependent limiting factor EXCEPT

collective animal behavior of similar size with aggregate together . Applied to insects.

describes how individuals in a group can act collectively without any centralized direction.

Which of the following describes the largest # of individuals that an environment can support?

Which of the following is a density-independent factor?

How will you do on this exam tomorrow? How much studying did you do?