The soft, fuzzy hair covering the body of a fetus in the second trimester is called
a. vernix caseosa.
b. fossa ovalis.
c. chorionic villus.
d. lanugo.
e. colostrum.
D
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What is the main reservoir for Nitrogen?
a. Sedimentary rock b. Plants c. Soil bacteria d. Feces e. Atmosphere
As part of the diving reflex of seals, the heart rate increases
____________________ Indicate whether the statement is true or false.
Which of the following laboratory procedures is used for culturing animal viruses in the laboratory?
A) cell cultures B) broth cultures C) embryonated eggs D) both cell cultures and embryonated eggs E) synthetic cytoplasm
Cultural eutrophication can be caused by
A. mercury from industrial sources. B. detergents, fertilizers, and sewage treatment plants. C. biological magnification. D. respiration and transpiration. E. bacteria and viruses from sewage and barnyard waste.