Cytoplasmic inheritance refers to genes found in
a. sex chromosomes.
b. mitochondria and chloroplasts.
c. viruses.
d. bacteria.
e. only one parent.
B
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Which of the following describes how facilitated diffusion is powered?
a. ATP is required directly. b. Facilitated diffusion is "free of cost." c. Facilitated diffusion is powered by endocytosis. d. The sodium-potassium pump powers facilitated diffusion. e. Energy is required to do the work of establishing and maintaining a concentration gradient.
Some very showy desert flowers avoid desiccation of delicate floral tissues by blooming at night. They are pollinated by
A) bees. B) hummingbirds. C) wind. D) bats.
E. coli is an intestinal bacterium that reproduces every 20 minutes. E. coli is representative of a(n) ____ species
a. r-selected b. k-selected c. type I d. logarithmic type-curve e. type IV
Studies on which experimental organism led to the discovery of the gene controlling development of the animal body plan?
a. Dictyostelium discoideum b. Drosophila melanogaster c. Xenopus laevis d. Mice