What is a tool of population ecology to study populations?
A. iteoparity
B. growth ecology
C. demography
D. exponential growth
E. disease ecology
C. demography
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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
When DNA replication begins, _____
a. the two DNA strands unwind from each other b. the two DNA strands condense for base transfers c. two DNA molecules bond d. old strands move to find new strands
Which of the following processes is under voluntary
control? a. filtration b. reabsorption c. urination d. secretion e. excretion
Which of the following statements describes the lysogenic cycle of lambda (?) phage?
A) After infection, the viral genes immediately turn the host cell into a lambda-producing factory, and the host cell then lyses. B) Most of the prophage genes are activated by the product of a particular prophage gene. C) The phage genome replicates along with the host genome. D) The phage DNA is copied and exits the cell as a phage.