How do worms help plants grow?

A. They carry out chemical reactions that convert carbon dioxide to nitrogen.
B. They add excrement, a source of nutrients, plus they produce air space by crawling through the soil.
C. They are a source of minerals.
D. They decompose organic material into compounds plants can use.


Answer: B

Environmental & Atmospheric Sciences

You might also like to view...

Which of these U.S. cities would be most affected by rising sea levels?

A. Miami B. Dallas C. Denver D. Atlanta

Environmental & Atmospheric Sciences

If the salinity of ocean water at the entrance to an estuary is 30 percent and the average salinity of the estuary is 20 percent, what fraction of the volume of water in the estuary is fresh water?

A. 1/2 B. 1/3 C. 1/4 D. 1/8 E. 16

Environmental & Atmospheric Sciences

Asking what effect stricter chlorofluorocarbon (CFC) controls in North America will have on the future size of the ozone hole over Antarctica is one example of analyzing a spatial interaction

a. True b. False Indicate whether the statement is true or false

Environmental & Atmospheric Sciences

The number or variety of species found in a particular area is called

A. ecological diversity. B. species diversity. C. functional diversity. D. biodiversity. E. genetic diversity.

Environmental & Atmospheric Sciences