If rotifers have a diploid number of 38, how many chromosomes would be found in a sperm
cell?
a. 38
b. 19
c. 76
B
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Complementation experiments are used to determine if two observed mutations that are associated with the same trait are actually in the same gene
Indicate whether the statement is true or false
Ethology is the study of ____
a. genetic mechanisms that underlie behavior b. how evolution shaped animal behavior c. how humans influence animal behavior d. physiological mechanisms that underlie behavior e. how animals process information
The convergence in external morphology of
sharks, penguins, and porpoises is attributed to a. reduced genetic variability in these groups. b. selection pressures that are common to these groups. c. reproductive isolation of these groups. d. identical genes in all three groups. e. use and disuse of the limbs
Which statement about a blastodisc is FALSE?
a. It can be further divided into an upper epiblast and below that, the hypoblast. b. It results from meroblastic cleavage. c. It is found in isolecithal eggs. d. It is a small disc of cytoplasm at the animal pole. e. It is characteristic of cell division in bird eggs.