Which reproductive isolating mechanism is displayed in a mule, the product of a cross between a horse and a donkey?
a. mechanical isolation
b. hybrid inviability
c. hybrid sterility
d. hybrid breakdown
e. temporal isolation
ANSWER: c
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The brain and nervous system of a developing embryo can only be damaged during the very early stages of development
a. True b. False Indicate whether the statement is true or false
The stomach of which one of the following birds contains a gland that produces a foul smelling, yellow colored oil?
a. pelicans b. gulls c. terns d. albatrosses e. oystercatcher
The most common type of joint in the human body is a ____
a. synovial joint b. fibrous joint c. membranous joint d. cartilaginous joint e. hinge joint