Ecology and Environment

Secondary consumers are also called _______.

• herbivores

• carnivores

• decomposers

• detritivores

What is biodiversity?

• It is the branch of biology that deals with the relations of organisms to one another and to their physical surroundings.

• It is composed of the regions of the surface and atmosphere of the earth or another planet occupied by living organisms.

• It is the variety of the earth's species, the genes they contain, the ecosystems in which they live and the processes that sustain life.

• It is the formation of new and distinct species in the course of evolution.

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Loss of habitat is the single greatest threat to species.

• True

• False

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True or false: An ecosystem with high genetic diversity is healthier than an ecosystem with low genetic diversity.

• True

• False

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Which option is biotic?

• Plants

• Air

• Water

• Energy

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All living and nonliving things in an environment and the many ways they interact are called ______

• ecosystem

• community

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Which organisms in the food web shown to the right are predators that compete for the same prey in this environment?

• Coyotes and rabbits

• White-tailed deer and rabbits

• Leafy weeds and cotton rats

• Bobcats and coyotes

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In what way are humans most impacting the biodiversity of ecosystems around the world?

• a. We are putting too many organisms in zoos or keeping them as pets

• b. We are increasing biodiversity by breeding new species

• c. We are destroying the habitats of a large number of species

• d. Recreational hunting

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Scientists think people have directly caused the extinction of some species through ______________.

• habitat destruction

• poaching

• pollution

• All of these

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In the energy pyramid here, which organisms have the most energy available?

• Producers

• Carnivores

• Herbivores

• Top Predator

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