Which of the following words are incorrectly paired?
a. head end?anterior
b. coelom?body cavity
c. schizocoelous development?deuterostome
d. shelled egg?internal fertilization
e. mesoderm?muscles
C
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If a cell has a normal osmotic pressure of 4500 mmHg and is placed into a solution with an osmotic pressure of 3500 mmHg, what will happen to the cell?
A. The cell will lose water and its osmotic pressure will decrease. B. The cell will gain water and its osmotic pressure will decrease. C. The cell will gain water and its osmotic pressure will increase. D. The cell will lose water and its osmotic pressure will increase.
Why are the ends of microfilaments and microtubules called "plus ends" and "minus ends"?
A. because monomers are added more quickly to one end (the "plus end") than they are to the other end (the "minus end") B. because polymerization occurs at one end (the "plus end") and depolymerization occurs at the other end (the "minus end") C. because monomers can be added to one end only (the "plus end"), and can only be removed from the other end (the "minus end") D. because the actin and tubulin monomers that make up microfilaments and microtubules have evolved more rapidly than most other proteins
Climate shifts may lead to affects on human activities such as
a. where people choose to live. b. the availability of reliable energy. c. the availability of reliable water supplies. d. the kinds of crops farmers grow. e. all of these.
Bootstrap resampling:
a. can be used with any technique for phylogenetic inference. b. can only be used with the model-based frameworks of maximum likelihood or Bayesian inference. c. does not yield statistical significance levels. d. can determine how strongly our character data support a given feature of a phylogenetic tree. e. A and C.