Which of the following pigments is found exclusively in red algae?
A) chlorophyll a
B) chlorophyll c
C) lutein
D) phycoerythrin
E) ?-carotene
D) phycoerythrin
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During the past century the global sea level has risen ________ in response to global warming. a. 16 inches b. 1 meter c. It hasn't risen at all
d. 2 feet e. 8 inches
Four of the five answers are reasons that Africanized honeybees are more dangerous than European honeybees. Select the exception
a. Africanized honeybees have more potent venom. b. Africanized honeybees attack in larger numbers. c. Africanized honeybees sting with less provocation. d. Africanized honeybees pursue with more persistence. e. Africanized honeybees lack a high threat threshold.
The Latin phrase omnis cellula e cellula refers to a cellular principle. Which of the following statements is the best interpretation of this phrase?
A) Tissues are composed of similar cells. B) Cells generally are found in clusters. C) All cells arise only from preexisting cells. D) Organs are composed of tissues and cells. E) The cell is the basic unit of structure.
What causes fever?
A) Macrophages release pyrogens, which cause body temperature to increase. B) Complementary proteins coat the surfaces of microbes and cause an increase in their temperature. C) The activity of B cells and T cells causes the body to give off more heat. D) Damaged cells release histamine, which increases body temperature.