Because the smooth ER does not contain ____, it cannot produce proteins

a. Golgi bodies
b. mitochondria
c. ribosomes
d. DNA
e. lysosomes


ANSWER: c

Biology & Microbiology

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A genotype refers to

A) the alleles present in an individual. B) expression patterns of certain genes. C) the environmental components of a trait. D) the number of chromosomes that a person has.

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Many male birds will expend a great deal of energy building nests. Females will mate with the males who build the

best nests. This is best described as an example of ____.

a. natural selection b. sexual selection c. runaway selection d. an invasive species e. disruptive selection

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If you were to penetrate through the epidermal layer

of a root, you would next encounter the a. xylem. b. endodermis. c. cortex. d. phloem. e. pericycle.

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Thyroid stimulating immunoglobin causes hyperthyroidism because it bypasses the effects of negative feedback on both the hypothalamus and pituitary and __________.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology