The vast majority of proteins expressed early in an animal's development
a. are translated from preexisting mRNAs present in the unfertilized egg.
b. are translated from preexisting mRNAs delivered by the sperm that fertilized an egg.
c. are translated from mRNAs that were transcribed from the zygote's DNA in the first three
rounds of cell division.
d. are transcribed and translated from the unfertilized egg's DNA postfertilization.
e. were present as inactive proteins in the unfertilized egg.
A
You might also like to view...
Plasmodesmata are cell-cell junctions that are found between _____
A) individual cardiac cells in heart muscle tissue B) adjacent plant cells C) adjacent animal cells in the same tissue type D) the plasma membrane of actively dividing prokaryotes
Fatty acids are stored in fat droplets in the form of
a. triacylglycerols. b. phospholipids. c. cholesterol. d. glycolipids.
Which of the following are characteristics of a keystone species?
A. They are most often mammals. B. They evoke a strong emotional response in people. C. Their presence dictates the survival of the entire community. D. They have a very large population. E. None of these are characteristics of keystone species.
What would be the result of an error in anaphase that failed to separate a pair of sister chromatids?
A) One cell would have an extra chromosome, and one cell would lack a chromosome. B) The nuclear envelope would not be able to break down. C) One cell would have an extra gene, and one cell would be missing one gene. D) Cytokinesis would not be able to take place, and the cells would not divide.