A higher rate of eye infections can be expected from a person who ________.

A. cannot produce tears
B. has a vitamin deficiency
C. is very young
D. wears glasses


Answer: A

Biology & Microbiology

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The shaded group includes all of the species that were derived from one common ancestor, this group could also be called a(n)



A. polyphyletic taxon.
B. paraphyletic taxon.
C. phylum.
D. homology.
E. clade.

Biology & Microbiology

The simplest hypothesis for the original function of Hox genes is that the common ancestor of bilateral animals had Hox genes that were ________

A) expressed in the development of its appendages B) scattered throughout the genome C) expressed in the canonical spatial pattern D) crucial for the development of its digestive system E) organized in multiple clusters

Biology & Microbiology

The source of glucocorticoids is the

a. pituitary gland. b. adrenal cortex. c. adrenal medulla. d. thymus gland. e. thyroid gland.

Biology & Microbiology

The clavicle is attached on its medial end to the

a. vertebrae. b. sternum. c. intervertebral disks. d. sacrum. e. coccyx.

Biology & Microbiology