The distribution of phenotypes for human birth weight is a good example of:
a. the founder effect.
b. genetic drift.
c. directional selection.
d. disruptive selection.
e. stabilizing selection.
E
You might also like to view...
For Mendel's explanation of inheritance to be
correct, a. the genes for the traits he studied have to be located on the same chromosome. b. the combination of gametes at fertilization has to be due to chance. c. genes cannot be transmitted independently of each other. d. only diploid organisms demonstrate inheritance patterns. e. none of these apply.
Photoperiodism is the
a. duration of flowering in a plant. b. amount of light needed by a plant to exhibit normal growth. c. response of a plant to the duration of light and darkness. d. light phase of photosynthesis during which photolysis of water occurs. e. opposite of photorespiration.
Answer the following questions true (T) or false (F)
1. Most species of sponges live in freshwater environments, but a few species are marine. 2. Cnidarians such as jellyfish have muscle and nervous tissues. 3. Annelids demonstrate the important animal characteristic of body segmentation.
The conducting cells in xylem are
A. sieve tube elements. B. tracheids and sieve tube elements. C. tracheids. D. tracheids and vessel elements. E. vessel elements.