Which statement best supports why animals most likely evolved in the ocean?
a. They did not require a skeleton for support.
b. Reproduction was independent of internal fertilization.
c. The effects of gravity were minimal.
d. Osmoregulation was not difficult.
e. The changeable temperature facilitated natural selection.
D
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Amoeba is a term used to describe unicellular protists that move by means of flagella
Indicate whether the statement is true or false.
A mouse genomic library is constructed so that the number of clones equals one genomic equivalent. Is it likely that this library contains the entire mouse genome?
The mouse genome consists of 2,700 Mb. A genomic library is constructed using BAC vectors and overlapping fragments of the mouse genome. The average size of the mouse DNA inserts is 200 kb. A) No; by chance some parts of the genome will be represented more than once and others not at all. B) Yes; that is a sufficient number clones for every part of the genome to be represented one time. C) No; the restriction enzyme used to fragment the genome will delete some DNA on the ends of clones.
Figure 17.3
If the population of flowers illustrated in the accompanying Punnett square is in genetic equilibrium, the frequency of the homozygous dominant genotype in the new generation will be ____.
A. p2 B. 2pq C. p2 + q2 D. q2 E. p2 + 2pq
Discuss the various ways by which antibodies interact with antigen and facilitate antigen inhibition or destruction.
What will be an ideal response?