The earliest primates arose about:a
200 million years ago.
b. 125 million years ago.
c. 55 million years ago.
d. 22 million years ago.
e. 12.5 million years ago.
C
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The vaccine for immunity to Haemophilus influenzae serotype b is ________.
A. DTaP B. Pneumovax C. Hib D. MMR
Which of the following leads to the occurrence of vertebrate sense organs?
A. both adrenal medullary cells and sympathetic neurons derive from the neural crest B. neural crest cells form both neurons that carry messages and cartilaginous bars C. the neural crest and associated sensory ganglia D. formation of the endoderm E. formation of the autonomic nervous system
The human papilloma virus (HPV) causes
A) gonorrhea. B) vaginal yeast infections. C) genital herpes. D) syphilis. E) genital warts.
What is a challenge that organisms living in an intertidal zone face that other aquatic organisms normally do not face?
A. damage from pollution B. changes in temperature at different depths C. movement of water D. light penetrating only through the photic zone E. daily changes in water depth