Answer the following question given this paragraph: The marsupial embryo is nourished inside the uterus with food from a yolk sac instead of through a placenta. The yolk sac stores enough food for the short period of time the embryo remains in the uterus. After the embryo is born, it moves into the mother's pouch, where it clings to a nipple. It remains inside the pouch for several months while it continues to grow and develop. Even after the offspring is big enough to leave the pouch, it may often return to the pouch for warmth and nourishment. Eventually, the offspring is mature enough to remain outside the pouch on its own. Q: The marsupial embryo is nourished inside the uterus with food from a yolk sac instead of through a what? Choices: - stomach - ovum - umbilical cord - placenta A:
placenta
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Answer the following question given this paragraph: Scientists perform experiments to test their hypotheses because sometimes the nature of natural universe is not obvious. Q: Scientists perform experiments to test their hypotheses because sometimes the nature of natural universe is what? Choices: - become obvious - very obvious - this obvious - not obvious A:
not obvious
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Answer the following question given this paragraph: Pathologist A pathologist is a medical doctor or veterinarian who has specialized in the laboratory detection of disease in animals, including humans. These professionals complete medical school education and follow it with an extensive post-graduate residency at a medical center. A pathologist may oversee clinical laboratories for the evaluation of body tissue and blood samples for the detection of disease or infection. They examine tissue specimens through a microscope to identify cancers and other diseases. Some pathologists perform autopsies to determine the cause of death and the progression of disease. Q: What type of doctor specializes in the laboratory detection of disease? Choices: - internist - diagnostician - infectious disease physician - pathologist A:
pathologist
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Answer the following question given this paragraph: Within the microsporangium, the microspore mother cell divides by meiosis to give rise to four microspores, each of which will ultimately form a pollen grain (Figure 32.7). An inner layer of cells, known as the tapetum, provides nutrition to the developing microspores and contributes key components to the pollen wall. Mature pollen grains contain two cells: a generative cell and a pollen tube cell. The generative cell is contained within the larger pollen tube cell. Upon germination, the tube cell forms the pollen tube through which the generative cell migrates to enter the ovary. During its transit inside the pollen tube, the generative cell divides to form two male gametes (sperm cells). Upon maturity, the microsporangia burst, releasing the pollen grains from the anther. Q: Within the microsporangium, the microspore mother cell divides by meiosis to give rise to four microspores, each of which will ultimately form this? Choices: - zygote - sperm cell - ova - pollen grain A:
pollen grain
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