If two organisms of different species share more similar DNA sequences with each other than with other species, we can conclude that ________
A) these two species are not closely related
B) these two species are very closely related
C) these two species happen to share similar DNA by chance
D) there is no relationship between similar DNA and how closely related organisms are
B
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Which event occurs during a strong El Niño year?
a. light rains in the central and eastern Pacific ocean b. upwelling of cold water in the western Pacific ocean c. death of phytoplankton in western coastal areas d. cold surface currents flowing from west to east e. strengthened equatorial winds
All crocodilians
a. live in or near water. b. are predators with sharp teeth. c. have a four-chambered heart. d. have powerful jaws. e. fit all of these descriptions
The autosomal (not X-linked) gene for brachydactyly, short fingers, is dominant to normal finger length. Assume that a female with brachydactyly in the heterozygous condition is married to a man with normal fingers. What is the probability that their
first two children will have brachydactyly? A) 1/8 B) 1/2 C) 2/3 D) 1/4 E) 3/4
Which of the following would contribute most to successful exon shuffling?
(a) shorter introns (b) a haploid genome (c) exons that code for more than one protein domain (d) introns that contain regions of similarity to one another