Unit Test — Unit test

Question 1

The Serengeti plains are part of the African savanna ecosystem and are home to a variety of different species of plants and animals. The Serengeti plains experience a seven-month period of seasonal drought each year, during which the ecosystem receives only four inches of rain and the availability of some resources becomes very scarce. Which type of limiting factors does the seasonal drought in the Serengeti plains affect?

Revolt · Accepted Answer

density-independent factors

Question 2

Both photosynthesis and cellular respiration are part of the carbon cycle. Which statement best compares these two processes?

Revolt · Accepted Answer

Both provide organisms with usable energy.

Question 3

Read the following excerpt about water availability to living organisms.“Water covers 75 percent of Earth. 97 percent of water on Earth is salt water. Only 3 percent of water is available as fresh water, but most of this water is locked up in solid glaciers and polar ice caps.” Based on this information, which is the best approximation of the amount of water on the planet that is available for animals to drink?

Revolt · Accepted Answer

1 percent

Question 4

Review the picture below.Which would be the most accurate title for this picture?

Revolt · Accepted Answer

primary succession after a volcanic eruption

Question 5

What is the difference between food chains and food webs?

Revolt · Accepted Answer

Food chains show a single path of energy in an ecosystem, and food webs show overlapping pathways of energy in that ecosystem.

Unit Test — Unit test Answers

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