Embryonic cells that have the potential to become any cell type are called:
a. connective cells
b. epithelial cells
c. muscle cells
d. nerve cells
e. stem cells
e
You might also like to view...
Molecules that regulate defense responses via signal transduction pathways are called ____
a. complement proteins b. histamines c. macrophages d. cytokines e. defensins
Which of the following is NOT involved in
nitrogen fixation? a. breaking triple bonds b. production of ammonia c. production of NO3 ? d. production of NH4 + e. All of these are involved in nitrogen fixation
The debate over nature vs. nurture in determining certain human characteristics can be explained by pleiotropic genes. Indicate whether the statement is true or false
Drier climates tend to prevail:a
on the windward side of mountains. b. in a rain shadow. c. close to the coast of the continent. d. in temperate regions. e. only in the northern hemisphere