Answer the following question given this paragraph: Courtesy of Dr. Triche and the National Cancer Institute. Lymphocytes are the key cells of an immune response . Public Domain. Q: What are the key cells of an immune response? Choices: - keratinocytes - erythrocytes - histiocytes - lymphocytes A:
lymphocytes
(Question)
Answer the following question given this paragraph: Q: What brain structure is important in recognizing and recalling emotions? Choices: - pituitary - cerebral cortex - thalmus - amygdala A:
(Answer)
amygdala
Ques: Answer the following question given this paragraph: Q: What evolutionary process does not favor altruistic behavior that causes the death of the altruist? Choices: - flow selection - characteristic selection - random selection - natural selection A:
Ans: natural selection
(Q).
Answer the following question given this paragraph: Explore the sea star's body plan (http://openstaxcollege. org/l/sea_star) up close, watch one move across the sea floor, and see it devour a mussel. Brittle stars belong to the class Ophiuroidea. Unlike sea stars, which have plump arms, brittle stars have long, thin arms that are sharply demarcated from the central disk. Brittle stars move by lashing out their arms or wrapping them around objects and pulling themselves forward. Sea urchins and sand dollars are examples of Echinoidea. These echinoderms do not have arms, but are hemispherical or flattened with five rows of tube feet that help them in slow movement; tube feet are extruded through pores of a continuous internal shell called a test. Sea lilies and feather stars are examples of Crinoidea. Both of these species are suspension feeders. Sea cucumbers of class Holothuroidea are extended in the oral-aboral axis and have five rows of tube feet. These are the only echinoderms that demonstrate "functional" bilateral symmetry as adults, because the uniquely extended oral-aboral axis compels the animal to lie horizontally rather than stand vertically. Q: What type of feeders are sea lilies and feather stars? Choices: - deposit feeder - bottom feeder - silt feeders - suspension feeders A:
(A).
suspension feeders
Ques:Answer the following question given this paragraph: Clouds are classified on the basis of where and how they form. Three main types of clouds are cirrus, stratus, and cumulus. Figure below shows these and other types of clouds. Q: Cirrus, stratus, and cumulus are the main types of what? Choices: - weather - storms - climate - clouds A:

Ans:clouds
Answer the following question given this paragraph: About 13.7 billion years ago, the entire universe was packed together. Everything was squeezed into a tiny volume. Then there was an enormous explosion. After this "big bang," the universe expanded rapidly ( Figure below ). All of the matter and energy in the universe has been expanding ever since. Scientists have evidence this is how the universe formed. One piece of evidence is that we see galaxies moving away from us. If they are moving apart, they must once have been together. Also, there is energy left over from this explosion throughout the universe. The theory for the origin of the universe is called the Big Bang Theory . Q: The once compressed universe expanded rapidly after what nicknamed event billions of years ago? Choices: - big explosion - good bang - big bust - big bang A:
big bang