Which of the following is an example of sexually antagonistic selection?
a. Male fights over females raise the risk of female injury.
b. Male red deer with high lifetime reproductive fitness have daughters with low lifetime reproductive fitness.
c. Female birds engage in extra-pair copulations with males other than the one providing the main brood care.
d. Red coloration in sticklebacks is an honest signal of male parasite re-sistance.
e. A, B, and C.
E
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A number of major disease-causing protists are found in the
a. Euglenoids. b. Excavates. c. Archaeplastida. d. Diatoms. e. Brown algae.
What is the consequence to a bacterial cell of a mutation that inactivates the enzyme responsible for methylating the A in the DNA sequence 5? GATC?
A) Replication of the lagging strand cannot be completed. B) Thymine dimers cannot be repaired. C) Parental and new DNA strands cannot be distinguished during mismatch repair. D) Expression of certain metabolic genes is decreased. E) The mutation rate of all genes will be lower.
Assuming no crossing over between the gene in question and the centromere, when do alleles segregate during meiosis?
What will be an ideal response?
Four of the following are members of the bony fishes. Which one is the exception?
A. Teleosts B. Ray-finned fish C. Lungfish D. Stingrays E. Lobe-finned fishes