The failure of chromosomes to separate during
mitosis or meiosis is called
a. genetic displacement.
b. trisomy.
c. crossing over.
d. nondisjunction.
e. disjunction.
D
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Foreign cells that enter the human body have unique cell surface proteins, known as ________, which stimulate the body's defense to attack
A) leukocytes B) Rh factors C) antibodies D) platelets E) antigens
Matching.Choose the one most appropriate description.
A. Carbon fixation B. The PGA to PGAL conversion C. The formation of glucose D. Noncyclic pathway of ATP formation E. Cyclic pathway of ATP formation
The two major anatomical divisions of the nervous system are the
A) sympathetic nervous system and parasympathetic nervous system. B) central nervous system and peripheral nervous system. C) sensory nervous system and motor nervous system. D) voluntary nervous system and involuntary nervous system.
Which of the following structures houses the corpus luteum?
a) ovary b) uterus c) vagina d) fallopian tube e) follicle