Once inside the human body, HIV primarily infects ____
a. liver tissue
b. kidney tissue
c. red blood cells
d. white blood cells
e. brain tissue
ANSWER: d
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Neurons that carry messages from sensory receptors to the CNS are
(a) sensory. (b) motor. (c) interneurons. (d) both a and b.
A ____ restricts productivity
a. primary producer b. secondary producer c. photosynthesizer d. detritivore e. limiting nutrient
Genetics is the study of ________
A) mutation and recession B) heredity and variation C) diploid and haploid D) replication and recombination E) transcription and translation
Four of these statements about master genes are true. Which statement is not true?
A. They orchestrate layers of development. B. They are highly conserved over evolutionary time. C. Mutations within these are frequently devastating. D. They are highly variable in their sequences between species. E. Mutations usually result in changes in body plan.