Cartilage is different from bone because cartilage:a
is rich in nerves.
b. contains veins.
c. has a matrix that is composed almost exclusively of collagen.
d. contains lymphatic vessels.
e. contains arteries.
C
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Inflammation helps to fight infection by
A) creating an environment in the body that is hostile to pathogens. B) producing antibodies that kill viruses and bacteria. C) limiting the number of phagocytes at the infection site. D) producing collectins, cytokines, and red blood cells.
The biological species concept relies primarily on the ability of individuals within the species to
a. adapt to the environment. b. have greater longevity. c. intermingle with other species. d. live in a variety of habitats. e. produce fertile offspring when mating with one another.
Which hormones stimulate the growth of mammary glands during pregnancy?
a. oxytocin and prolactin b. somatotropin and oxytocin c. prolactin and somatotropin d. estrogen and progesterone e. estrogen and oxytocin
As helicase unwinds the DNA molecule, what keeps the strands apart?
A) DNA polymerase B) Reverse transcriptase C) Replication fork D) Single-strand binding proteins E) Okazaki fragments