Answer the following question given this paragraph: Veins are blood vessels that carry blood toward the heart. This blood is no longer under pressure, so veins have thinner walls. To keep the blood moving, many veins have valves that prevent the backflow of blood. Veins generally carry oxygen-poor blood. The smallest veins are called venules. They merge to form larger and larger veins. The largest vein is the inferior vena cava, which carries blood from the lower body directly to the heart. Q: What are the blood vessels that carry blood toward the heart and tend to have thinner walls? Choices: - capillaries - glands - clots - veins A:
veins
(Question)
Answer the following question given this paragraph: Animals are multicellular eukaryotes in the Animal Kingdom. All animals are heterotrophs. They eat other living things because they can't make their own food. All animals also have specialized cells that can do different jobs. Most animals have higher levels of organization as well. They may have specialized tissues, organs, and even organ systems. Having higher levels of organization allows animals to perform many complex functions. For a visual introduction to what makes a living thing an animal, watch this short video: https://www. youtube. com/watch?v=DXPhJUHooP8 . Q: All animals have specialized types of what basic structures, which can then do different jobs? Choices: - proteins - muscles - atoms - cells A:
(Answer)
cells
Ques: Answer the following question given this paragraph: Q: Each daughter cell represents one outcome of all possible combinations of maternal and paternal what? Choices: - traits - alleles - genes - chromosomes A:
Ans: chromosomes
(Q).
Answer the following question given this paragraph: 21.6 Comparing genome sequences provides clues to evolution and development. Q: Comparing what sequences provides clues to evolution and development? Choices: - DNA - genes - organisms - genome A:
(A).
genome
Ques:Answer the following question given this paragraph: Arctic Tundra The Arctic tundra lies north of the subarctic boreal forest and is located throughout the Arctic regions of the northern hemisphere (Figure 44.12). The average winter temperature is -34 C (-34 F) and the average summer temperature is from 3 C to 12 C (37 F52 F). Plants in the arctic tundra have a very short growing season of approximately 1012 weeks. However, during this time, there are almost 24 hours of daylight and plant growth is rapid. The annual precipitation of the Arctic tundra is very low with little annual variation in precipitation. And, as in the boreal forests, there is little evaporation due to the cold temperatures. Plants in the Arctic tundra are generally low to the ground (Figure 44.20). There is little species diversity, low net primary productivity, and low aboveground biomass. The soils of the Arctic tundra may remain in a perennially frozen state referred to as permafrost. The permafrost makes it impossible for roots to penetrate deep into the soil and slows the decay of organic matter, which inhibits the release of nutrients from organic matter. During the growing season, the ground of the Arctic tundra can be completely covered with plants or lichens. Q: What is it called when the soils of the arctic tundra remain in a perennially frozen state? Choices: - concentrated freeze - permafreeze - glacial domination - permafrost A:

Ans:permafrost
Question: Answer the following question given this paragraph: Phytoplankton are "plant-like" plankton. Since they make food by photosynthesis, they live in the photic zone. Most are algae. Q: Which type of plankton make food via photosynthesis? Choices: - dinoflagellates - common plankton - zooplankton - phytoplankton A:
Answer:
phytoplankton