The thick layers of cells covering and protecting the delicate apical meristem is called the:
a. root cap.
b. root hairs.
c. pericycle.
d. adventitious root.
e. radicle.
A
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The immunity of some black Africans to malaria is probably due to their
A. general health. B. cultural practices. C. age. D. genetic background.
The earliest species known to reproduce sexually was a
a. cyanobacterium. b. green alga. c. fungus. d. red alga. e. archaebacterium.
Antidiuretic hormone is produced in the
a. pons. b. medulla oblongata. c. hypothalamus. d. amygdala. e. pituitary gland
A physician finds that one of his patients has the following problems: Blood clots very slowly or not at all, and severe bruises result from even the most minor bumps
Which one of the following conditions would likely be diagnosed based on this information? A) polycythemia B) hemophilia C) AIDS D) anemia E) mononucleosis