(Q).
Q: What is the opposite of rarefaction zones, where air molecules in waves are loosely packed? Read this paragraph and choose the correct option from the provided answers: Longitudinal waves, like sound waves, have compression and rarefaction zones. The compression zones are where, for example in a sound wave traveling through air, the air molecules are densely packed. The rarefaction zones are areas where the air molecules are loosely packed, like a vacuum zone. Us teachers will often draw longitudinal waves as transverse waves, but remember the difference. Choices: - molecules zones - pressure wave - measurements zones - compression zones A:
(A).
compression zones

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Q: Evolution that occurs over a short period of time is known as what? Read this paragraph and choose the correct option from the provided answers: Evolution that occurs over a short period of time is known as microevolution . It might take place in just a couple of generations. This scale of evolution occurs at the level of the population. The Grants observed evolution at this scale in populations of Darwin's finches. Beak size in finch populations changed in just two years because of a serious drought. Choices: - short term evolution - pseudoevolution - relatedness - microevolution A:
(A).
microevolution

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Q: Nervous tissue consists of just two basic types of nerve cells: neurons and? Read this paragraph and choose the correct option from the provided answers: Although the nervous system is very complex, nervous tissue consists of just two basic types of nerve cells: neurons and glial cells. Neurons are the structural and functional units of the nervous system. They transmit electrical signals, called nerve impulses. Glial cells provide support for neurons. For example, they provide neurons with nutrients and other materials. Choices: - white blood cells - red blood cells - mammalian cells - glial cells A:
(A).
glial cells