Answer the following question given this paragraph: Proteins are molecules that have many different functions in living things. All proteins are made of monomers called amino acids ( Figure below ) that connect together like beads on a necklace ( Figure below ). There are only 20 common amino acids needed to build proteins. These amino acids form in thousands of different combinations, making about 100,000 or more unique proteins in humans. Proteins can differ in both the number and order of amino acids. It is the number and order of amino acids that determines the shape of the protein, and it is the shape (structure) of the protein that determines the unique function of the protein. Small proteins have just a few hundred amino acids. The largest proteins have more than 25,000 amino acids. Q: All proteins are made of monomers called what? Choices: - monotides - aminotides - peptides - amino acids A:
amino acids
(Question)
Answer the following question given this paragraph: Q: Where does oxygen enter the blood? Choices: - in the heart - in the veins - in the liver - in the lungs A:
(Answer)
in the lungs
Ques: Answer the following question given this paragraph: Cold air is dense, so it sinks. This creates a center of high pressure. Warm air is less dense so it rises. This creates a center of low pressure. Air always flows from higher to lower pressure. As the air flows, Earth's surface rotates below it causing Coriolis effect. So while the wind blows into the low pressure, it revolves in a circular pattern. This wind pattern forms a cyclone. The same happens while the wind blows out of a high pressure. This forms an anticyclone. Both are shown in Figure below . Q: How does air always flow? Choices: - in to out - left to right - low to high - high to low A:
Ans: high to low
(Q).
Answer the following question given this paragraph: During the early Paleozoic, the amount of carbon dioxide in the atmosphere was much greater than it is today. This may have begun to change later, as land plants became more common. As the roots of land plants began to infiltrate rock and soil began to form, carbon dioxide was drawn out of the atmosphere and became trapped in the rock. This reduced the levels of carbon dioxide and increased the levels of oxygen in the atmosphere, so that by the end of the Paleozoic, atmospheric conditions were similar to those of today. As plants became more common through the latter half of the Paleozoic, microclimates began to emerge and ecosystems began to change. As plants and ecosystems continued to grow and become more complex, vertebrates moved from the water to land. The presence of shoreline vegetation may have contributed to the movement of vertebrates onto land. One hypothesis suggests that the fins of aquatic vertebrates were used to maneuver through this vegetation, providing a precursor to the movement of fins on land and the development of limbs. The late Paleozoic was a time of diversification of vertebrates, as amniotes emerged and became two different lines that gave rise, on one hand, to mammals, and, on the other hand, to reptiles and birds. Many marine vertebrates became extinct near the end of the Devonian period, which ended about 360 million years ago, and both marine and terrestrial vertebrates were decimated by a mass extinction in the early Permian period about 250 million years ago. Q: During the early paleozoic, the amount of carbon dioxide in the atmosphere compared to today was? Choices: - none - the same - much lower - much greater A:
(A).
much greater
Ques:Answer the following question given this paragraph: Skin protects the body from injury, water loss, and microorganisms. It also plays a major role in maintaining a stable body temperature. Q: Which organ protects the body from injury, water loss, and microorganisms? Choices: - kidney - stomach - liver - skin A:

Ans:skin
Answer the following question given this paragraph: At higher latitudes, the Sun's rays are less direct. The farther an area is from the Equator, the lower its temperature. Q: The farther an area is from the equator, what happens to the temperature? Choices: - it fluctuates - it increases - it stabilizes - it gets lower A:
it gets lower