The oldest microfossils are of
A. pollen grains.
B. insects.
C. eukaryotes.
D. prokaryotes.
E. small animals.
Answer: D
You might also like to view...
Which of the following structural motifs found in transcriptional regulators is the least likely to require an inverted repeat for binding to DNA?
A. helix-turn-helix B. homeodomain C. leucine zipper D. zinc finger
Electron transfer phosphorylation yields ____ ATPs
a. four b. two c. three d. 32 e. zero
A meal consisting of a cheeseburger, large fries, and a chocolate shake provides a total of 1,120 kilocalories. Forty-eight percent of the energy in the meal is from carbohydrate and 13 percent is from protein. How many kilocalories of fat does the meal contain?
What will be an ideal response?
Given the large number of tandem rDNA genes, how is the sequence of each copy prevented from accumulating mutations and becoming nonfunctional?
What will be an ideal response?