As cleavage continues during frog development, the size of the blastomeres _____
A) increases as the number of the blastomeres decreases
B) increases as the number of the blastomeres increases
C) decreases as the number of the blastomeres increases
D) decreases as the number of the blastomeres decreases
C
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A road that dichotomizes is
(a) an intersection of two crossroads. (b) a road that forks into two roads. (c) a road that has numerous entrances and exits. (d) a road that leads nowhere.
Osmoregulation is best defined as:
A. the control of osmotic pressure through regulation of water and solute levels. B. the movement of water from areas of lower solute concentration to areas of higher solute concentration. C. the difference in solute concentration on the two sides of a membrane. D. the movement of water through aquaporins. E. the regulation of membrane permeability.
How would you best explain the correlation between an increase in Hox genes and an increase in animal body complexity?
A. Different Hox genes are expressed in different regions of the body. B. Hox genes have duplicated several times during animal evolution, but they are not responsible for an increase in body plan complexity. C. An increase in the number of Hox genes allows for greater specialization in different body regions. D. An increase in the number of Hox genes meant that fewer regulatory genes could be controlled in a species. E. As the number of Hox genes increases, the number of genes encoding proteins for appendage development decreases
the phenotypic ratio for a dihybrid cross is
What will be an ideal response?