Which part of the brain contains centers for the heartbeat and respiration?
A. pons
B. medulla oblongata
C. hypothalamus
D. cerebrum
E. cerebellum
Answer: B
Biology & Microbiology
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In humans, a normal egg or a normal sperm carries _____ chromosomes each.
A. 23 B. 33 C. 46 D. 56
Biology & Microbiology
Which of these pairs is correctly matched?
A) IgE: typically structured as a pentamer B) IgG: first immunoglobulin produced in a primary immune response C) IgM: readily crosses the placenta to protect the fetus/newborn D) IgA: found in secretions such as colostrum, tears, and mucus
Biology & Microbiology
An individual who is attracted to light is exhibiting
(a) negative phototaxis. (b) positive phototaxis. (c) negative thigmotaxis. (d) positive thigmotaxis.
Biology & Microbiology
A characteristic that an organism displays is called __________
A. a gene B. a chromosome C. DNA D. gene expression E. a trait
Biology & Microbiology