Answer the following question given this paragraph: The epidermis of the leaf consists of a single layer of tightly-packed dermal cells. They secrete waxy cuticle to prevent evaporation of water from the leaf. The epidermis has tiny pores called stomata (singular, stoma) that control transpiration and gas exchange with the air. Figure below explains how stomata carry out this vital function. Q: The epidermis of the leaf consists of a single layer of which cells? Choices: - endothermic cells - insular cells - chloroplasm - dermal cells A:
dermal cells
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Answer the following question given this paragraph: After spermatids form, they move into the epididymis to mature into sperm, like the one shown in Figure below . The spermatids grow a tail and lose excess cytoplasm from the head. When a sperm is mature, the tail can rotate like a propeller, so the sperm can propel itself forward. Mitochondria in the connecting piece produce the energy (ATP) needed for movement. The head of the mature sperm consists mainly of the nucleus, which carries copies of the father's chromosomes. The part of the head called the acrosome produces enzymes that help the sperm head penetrate an egg. Q: After spermatids form, they move where to mature into sperm? Choices: - into the prostate - into the volaris - into the vans deferens - into the epididymis A:
into the epididymis
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Answer the following question given this paragraph: Most halogens have a variety of important uses. A few are described in the Table below . Q: What is the force pushing a rocket called? Choices: - momentum - friction - direction - thrust A:
thrust
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Answer the following question given this paragraph: Earth has a magnetic field ( Figure below ). The magnetic field has north and south poles. The field extends several thousand kilometers into space. Earth's magnetic field is created by the movements of molten metal in the outer core. Q: What type of field does earth have? Choices: - atmospheric - seismic - force field - magnetic A:
magnetic
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