Which of the following correctly matches a component of the cytoskeleton to one of its functions?
A) microfilaments form the nuclear lamina
B) microtubules help animal cells divide in two
C) microfilaments cause ciliary bending
D) intermediate filaments contribute to cytoplasmic streaming
E) microtubules move chromosomes
Answer: E
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In what way or ways does or do seedless
vascular plants differ from seed plants?
a. seedless vascular plants do not have a sporophyte stage; seed plants do b. the sporophyte of the seed plants gives rise to gametes; the sporophyte of seedless vascular plants gives rise to spores c. the gametophyte of the seedless vascular plants is free-living; the gametophyte of seed plants is not d. the sporophyte of seedless vascular plants is haploid; the sporophyte of the seed plants is diploid e. the gametophyte of the seed plants form spores; the gametophyte of the seedless vascular plants form gametes
Enzymes are mostly____, and they function as ____.
Fill in the blank(s) with the appropriate word(s).
Convergent evolution gives rise to analogous structures in unrelated taxa
a. true b. false
A drug that blocked the Na+/K+ ATPase would have what effect on ion concentrations and the membrane potential?
a. The ion concentrations across the membrane would immediately equalize and the membrane potential would go to zero. b. Ion concentrations would slowly equalize, and over time, the membrane potential would become more negative. c. Ion concentrations would slowly equalize, and over time, the membrane potential would go toward zero. d. Ion concentrations would not change, but the membrane potential would go to zero.