Consider three species (1, 2, and 3). It's known that species 1 and 3 were separated 10 million years ago based on geologic measurements
Genetic analysis at a neutral locus indicates that these species differ by 100 substitu-tions. If there are 10 substitutions separating species 1 and 2, how long ago did they diverge?
a. 0.1 million years ago
b. 1 million years ago
c. 10 million years ago
d. 100 million years ago
e. cannot be determined based on the information provided
B
You might also like to view...
The fossil Lucy (Australopithecus afarensis) is significant because, at _____ years old, hers is the first species to _____
A. 20 million; have been fully bipedal B. 1.3 million; have hominin brow ridges C. 3.2 million years; be fully bipedal D. 1.3 million; migrate out of Africa E. 600,000; have homin brow ridges
In general, a cell receiving a message undergoes three stages of cell signaling. What are these stages?
a. paracrine, autocrine, and local b. signal reception, signal transduction, and cellular response c. signal reception, nucleus disintegration, and apoptosis d. signal reception, cellular response, and cell division e. the alpha, beta, and gamma
The molecular defect in sickle cell anemia is known to reside at the position ____________________
of the ____________________ globin Fill in the blank(s) with the appropriate word(s).
All the following are plant adaptations to low temperatures, except
A) shedding leaves at the onset of cold weather. B) production of antifreeze molecules. C) a shifting of Topt. D) increased photosynthetic rate to heat leaves.