Hybridization and polyploidy led to the evolution of
a. mallard ducks.
b. common bread wheat.
c. apple maggots.
d. bent grass.
e. the great apes.
B
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Which one of the following species is endangered by human activity but not yet extinct?
A. the dodo B. the dusky seaside sparrow C. the African white rhinoceros D. the carrier pigeon E. the Bali tiger
The category of organisms that get their energy and nutrients by feeding on the tissues, wastes, or remains of other
organisms are generally called ____.
a. producers b. prokaryotes c. consumers d. archaea e. plants
Which of the following is true of the adrenal medulla?
1.It controls sodium and water reabsorption in kidneys. 2.It releases norepinephrine into the blood. 3.It secretes sex hormones. 4.It decreases cortisol level in the blood.
In humans and some other vertebrates, the organ that collects sound and directs them to the auditory canal is called the ____.
A. auditory nerve B. cochlea C. eardrum D. pinna E. round window