How do worms help plants grow?
A) They are a source of minerals.
B) They carry out chemical reactions that convert carbon dioxide to nitrogen.
C) They decompose organic material into compounds plants can use.
D) They add excrement, a source of nutrients, plus they produce air space by crawling through the soil.
D
You might also like to view...
Malaria is caused by
a. viruses b. bacteria c. Plasmodium parasites d. parasitic worms e. mosquitoes
Which of the following can cause a seiche?
A. convection over a large land mass B. very strong winds C. high mountains interfering with a westerly wind flow D. wind shear at very high altitudes
A form of symbiosis that benefits one species of the interaction while having no effect on the other species is known as
A. commensalism. B. parasitism. C. mutualism. D. predation.
The San Andreas fault near San Francisco
A. is locked and therefore accumulating stress. B. is not of much concern because it is seismically quiet. C. is not very dangerous because it only slips a few meters at a time. D. has been undergoing creep since the 1906 earthquake.