Which of the following fossils is most like a
lobe-finned fish?
a. Tiktaalik
b. Icthyostega
c. Eusthenopteron
d. Sinosauropteryx
e. Confuciusornis
C
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In general, which group is MOST resistant to radiation?
A) microscopic fungi B) viruses C) thermotolerant bacteria D) spore-forming bacteria
What is illustrated by the amino acid sequence of the p53 protein in Figure 23.13?
A. no significant patterns of sequence similarity.
B. greater sequence similarity within closely related groups.
C. greater sequence similarity between distantly related groups.
D. the gene for p53 protein originated in Homo sapiens.
Feeding in sponges is dependent on
a. collar cells. b. pores. c. water flow. d. pores and water flow. e. all of the above.
Chromosome condition in which a diploid cell has one more chromosome than normal; designated as 2n+1.
What will be an ideal response?