Which of the following is mismatched?
A) diapedesis — movement of leukocytes between capillary walls cells out of blood and into tissue
B) chemotaxis — chemical degradation inside a phagolysosome
C) abcess — a cavity created by tissue damage and filled with pus
D) pus — tissue debris and dead phagocytes in a white or yellow fluid
E) scab — dried blood clot over injured tissue
B
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Arctic foxes typically have a white coat in the winter. In summer, when there is no snow on the ground, the foxes typically have a darker coat. Which of the following is most likely responsible for the seasonal change in coat color?
(A) The decrease in the amount of daylight in winter causes a change in gene expression, which results in the foxes growing a lighter- appearing coat. (B) The diet of the foxes in summer lacks a particular nutrient, which causes the foxes to lose their white coat and grow a darker- colored coat. (C) Competition for mates in the spring causes each fox to increase its camouflage with the environment by producing a darker- appearing coat. (D) The lower temperatures in winter denature the pigment molecules in the arctic fox coat, causing the coat to become lighter in color.
Which of the following is an example of alternation of generations?
A) A grandparent and grandchild each have dark hair, but the parent has blond hair. B) A diploid plant (sporophyte) produces, by meiosis, a spore that gives rise to a multicellular, haploid pollen grain (gametophyte). C) A diploid animal produces gametes by meiosis, and the gametes undergo fertilization to produce a diploid zygote. D) A haploid mushroom produces gametes by mitosis, and the gametes undergo fertilization, which is immediately followed by meiosis.
Communication between cells occurs via ________ in plant cells and via ________ in animal cells
Fill in the blank(s) with correct word
The stages of follicle development are:
A) ovarian follicle, mature follicle, oocyte. B) tertiary follicle, secondary follicle, primary follicle, corpus luteum. C) corpus luteum, tertiary follicle, secondary follicle, primary follicle. D) primary follicle, secondary follicle, tertiary follicle, corpus luteum.