Two persons who have recessive genetic deafness marry and have 6 children. All the children can hear. The reason they can hear is most likely due to
A) epistasis.
B) pleiotropy.
C) sex linkage.
D) complementation.
E) partial penetrance.
D
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Which of the following could be considered a habitat island?
A. a person in line at the train station B. a lake surrounded by trees C. a patch of moss on a tree trunk D. All of the answer options are correct. E. None of the answer options is correct.
Amphibians can accomplish gas exchange using ____
a. gills only b. lungs only c. respiration through the skin only d. both gills and lungs e. gills, lungs, and respiration through the skin
What is the difference between a parasite and a parasitoid?
A) A parasite is larger. B) A parasitoid is harmless to the host. C) A parasite has only one host. D) A parasitoid typically always kill its host.
When a plasma membrane allows some substances through but not others, it is ________ .
a. nonpolar b. polar c. able to use active transport d. selectively permeable e. diffusible