Ecology

Which of the following best explains the length of primary and secondary succession?

• Primary succession is shorter than secondary succession because primary succession begins with soil left behind after the disaster.

• Primary succession takes longer than secondary succession because primary succession begins from scratch.

• Primary and secondary succession take the same amount of time.

• Secondary succession takes longer than primary succession because secondary succession begins with no soil left after the disaster.

Intraspecific competition is when _____________________

• 2 different species complete for resources

• 2 of the same species complete for resources

• both species benefit in the relationship

• none of the above are correct

Secondary succession can begin with a forest fire.  What is left behind after the fire?

• nothing

• bare rock

• a thriving ecosystem

•  soil

Primary succession may occur________________________.

• on an abandoned farm field

• on a lot bulldozed for a subdivision

• due to deforestation by tree farmers

• on an island formed by a volcanic eruption

The final end point of succession is called _________________.

•  staged community

• climax community   

• climatic change

• community development

Tags

NGSS.MS-LS2-4

The very first species to show up at the beginning of succession are called  _____________.

• introduced species

• indicator species

• keystone species

• pioneer species

Plants such as the Venus Flytrap respond to stimuli such as touch.   Which term refers to a plant’s response to touch?

• gravitropism

• thigmotropism

• hydrotropism

• phototropism

Plants will bend to grow toward the sun even when placed in a windowsill.  Which term refers to a plant’s response to sunlight?

• gravitropism

• thigmotropism

• hydrotropism

• phototropism

In the pond ecosystem diagram shown, which organism would be most affected by biomagnification?

• Producers

• 1st level consumers

• 2nd level consumers

• 3rd level consumers

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4

At each trophic level ___________% of energy is lost and ___________% of energy is transferred.

• 90, 10

• 10, 90

• 1, 9

• 9, 1

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3