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
C. An increase in the number of Hox genes allows for greater specialization in different body regions.
You might also like to view...
As climate changes because of global warming, plant species' ranges in the northern hemisphere may move northward. The trees that are most likely to avoid extinction in such an environment are those that _____
A) have seeds that are easily dispersed by wind or animals B) have thin seed coats C) produce well-provisioned seeds D) have seeds that become viable only after a forest fire E) disperse many seeds in close proximity to the parent tree
In order to provide more strength and resilience, the human vertebral column normally has how many curvatures?
A. one B. two C. three D. four
Assuming independent assortment for all gene pairs, what is the probability that the following parents, AABbCc × AaBbCc, will produce an AaBbCc offspring?
A) 1/2 B) 1/16 C) 1/8 D) 3/4
How do polypeptide drugs work?
A) They target the 50S subunit of prokaryotic ribosomes to block protein synthesis. B) They target the DNA replication enzymes DNA gyrase and topoisomerases. C) They act as competitive inhibitors of folic acid production. D) They interact with lipopolysaccharide and destabilize the outer membrane of the Gram-negative cell wall where they can then further destabilize the plasma membrane to cause cytoplasmic leakage and cell lysis. E) They work by inhibiting transpeptidase enzymes that are central to building peptidoglycan by forming the protein crosslinks that bind peptidoglycan's carbohydrate chains together in a chain link fence-like structure.