fall midterm

Local fisheries have had a problem with controlling water weed growth. A fisherman suggests introducing Asian Carp, a species not native to Indiana, to their lake. Which answer best describes an ecologist’s response to this idea?

• It would be a bad idea because this fish has no natural enemies and might become invasive.

• It would be a great idea because lakes need more fish

• It would be a bad idea because they do not taste good.

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-5

A scientific hypothesis __________________

• can be based on personal beliefs or opinions

• does not have to be tested to be accepted as correct

• can be tested by experimentation or observation

Tags

NGSS.MS-PS2-2

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

• water

• carbon

• sunlight

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

Suppose that a species of toads is introduced into a new environment to reduce the population of insects. If no other animals eat the toad, their population would most likely

• remain the same

• increase

• decrease and die out

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

A well-tested explanation that explains a lot of observations is (a)_______________

• inference

• theory

• controlled experiment

The movements of energy and nutrients through living systems are different because

• Energy forms chemical compounds and nutrients are lost as heat.

• nutrients flow in one direction and energy recycles.

• energy flows in one direction and nutrients recycle.

Tags

NGSS.MS-LS2-3

Which of these human activities is often responsible for the other three human activities?

• rapid increase of the human population

• increasing levels of air pollution

• increasing demand on limited food production

Tags

NGSS.MS-ESS3-4

 Which is a biotic factor?

• average temperature of the ecosystem

• concentration of oxygen in the ecosystem

• number and kinds of predators in the ecosystem

Tags

NGSS.MS-LS2-4

NGSS.MS-LS1-4

What kind of symbiotic relationship is “good for me, good for you”?

• parasitism

• commensalism

• mutualism

When organisms are fighting for the same resources, it’s 

• mutualism

• commensalism

• competition