After Darwin concluded his voyage on the Beagle, he proposed that the process of natural selection was a mechanism for:
A. overpopulation of finches on the Galapagos Islands.
B. speciation.
C. artificial selection.
D. sexual selection.
E. evolution.
E. evolution.
You might also like to view...
When investigators exposed embryos of African
clawed frogs to lake-water samples from “hot spots,” a. many of the tadpoles that developed had deformities. b. some resulting tadpoles never metamorphosed. c. the effects could be reduced by adding supplemental thyroid hormone. d. all of these occurred. e. none of these occurred.
The order of whorls from the flower's periphery to the center is:
a. sepals, petals, stamens, and carpels. b. carpels, petals, stamens, and sepals. c. petals, carpels, stamens, and sepals. d. sepals, carpels, stamens, and calyx. e. calyx, carpels, stamens, and sepals.
Are any of these vegetables actually fruit?
A. Carrots B. Sugar beets C. Corn D. Celery E. All of these are vegetables, none of them are fruit.
From earliest to latest, the overall sequence of early development proceeds in which of the following sequences?
A) first cell division ? synthesis of embryo's DNA begins ? acrosomal reaction ? cortical reaction B) cortical reaction ? synthesis of embryo's DNA begins ? acrosomal reaction ? first cell division C) cortical reaction ? acrosomal reaction ? first cell division ? synthesis of embryo's DNA begins D) acrosomal reaction ? cortical reaction ? synthesis of embryo's DNA begins ? first cell division