Plants get the nitrogen they need to build additional cells from
A. protein in the cells.
B. ammonia or nitrate in the soil.
C. denitrifying bacteria.
D. directly from the nitrogen in air.
B. ammonia or nitrate in the soil.
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Which of the following is not an autoimmune disease?
A. multiple sclerosis B. type I diabetes C. myasthenia gravis D. HIV E. All of these conditions are autoimmune diseases.
Which of the following provides energy for many chemoautotrophs at the bottom of the ocean?
a. hydrogen sulfide from hydrothermal vents b. ATP converted from sunlight c. macromolecules from living organisms d. nutrients from algae and bacteria
Horses typically can live around 30 years and a
healthy mare can produce one foal per year. Horses are __ species.
a. opportunistic b. type I c. K-selected d. r-selected e. more than one of these types of
Cellular slime molds can be distinguished from plasmodial slime molds on the basis of ____
a. reproductive structures b. spore formation c. number of nuclei per cell d. slime trails e. food requirements