Cyanobacteria
A. are a form of algae.
B. are prokaryotes.
C. use hydrogen sulfide as an electron source.
D. are eukaryotes.
B
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Transgenic goats produce
a. human factor VIII. b. CFTR protein to treat cystic fibrosis. c. human antithrombin III. d. both a and b. e. both b and c.
If one kind of plutonium isotope is not removed, the wastes from a nuclear power reactor must be kept
out of the environment for how many years before they are safe? a. 25 b. 250 c. 1000 d. 5000 e. 10,000 or more
Horticulturists often use ________ and other growth regulators applied as a paste to plant cuttings to stimulate root formation.
A. ethylene B. abscisic acid C. auxin D. cytokinins
A population pyramid:
a. reflects the number of individuals in various age groups in a population. b. predicts survival and mortality rates for an individual at a given age. c. directly predicts future age distributions of the population. d. shows the current birth and death rates of a population.