You received your genetic material from your parents in the form of DNA. Your DNA provides your cells with instruction for making ________
A) cholesterol B) polysaccharides C) lipids D) proteins
Answer: D
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The "central dogma" of retroviruses is most accurately described as
A) DNA ? protein. B) RNA ? protein. C) DNA ? RNA ? protein. D) protein ? RNA ? DNA ? protein. E) RNA ? DNA ? RNA ? protein.
The chemistry of living systems representing all chemical reactions is called
A. anabolism. B. metabolism. C. catabolism. D. thermodynamics. E. enzymology.
Genetic variation leads to genetic diversity in populations and is the raw material for evolution. Biological systems have multiple processes, such as reproduction, that affect genetic variation
They are evolutionarily conserved and shared by various organisms. Which statement best represents the connection between reproduction and evolution? A) Plants that use sexual reproduction are rare since this type of reproduction in plants does not contribute to genetic diversity. B) In order to increase genetic diversity for evolution in sexually reproducing organisms, mutations must occur in the zygote after fertilization. C) Since prokaryotic organisms reproduce asexually, there is no mechanism for them to add genetic diversity for evolution. D) Sexual reproduction increases genetic variation because random mutations can be shuffled between organisms.
During swallowing food, which structure moves downward to prevent food from entering the trachea?
a. larynx
b. pharynx
c. glottis
d. epiglottis
e. bronchus