Ques:Q: What is the waxy substance that epidermal cells secrete? Read this paragraph and choose the correct option from the provided answers: Dermal tissue covers the outside of a plant in a single layer of cells called the epidermis. You can think of the epidermis as the plant's skin. It mediates most of the interactions between a plant and its environment. Epidermal cells secrete a waxy substance called cuticle , which coats, waterproofs, and protects the above-ground parts of plants. Cuticle helps prevent water loss, abrasions, infections, and damage from toxins. Choices: - cellulose - bile - saliva - cuticle A:

Ans:cuticle
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Ques:Q: Carefully controlling the speed of a fission reaction produces what kind of energy? Read this paragraph and choose the correct option from the provided answers: Nuclear energy is produced by carefully controlling the speed of a fission reaction. Choices: - chemical - atomic - thermal - nuclear A:

Ans:nuclear
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Ques:Q: Just as the reaction of a diol and a diacid forms a polyester, the reaction of a diacid and a diamine yields this? Read this paragraph and choose the correct option from the provided answers: Polyamides Just as the reaction of a diol and a diacid forms a polyester (Section 15.8 "Preparation of Esters"), the reaction of a diacid and a diamine yields a polyamide. The two difunctional monomers often employed are adipic acid and 1,6-hexanediamine. The monomers condense by splitting out water to form a new product, which is still difunctional and thus can react further to yield a polyamide polymer. Choices: - phenol - polyethylene - acetone - polyamide A:

Ans:polyamide
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Ques:Q: What property is a measure of the average kinetic energy of molecules? Read this paragraph and choose the correct option from the provided answers: Temperature is a measure of the average kinetic energy of molecules. Consider a mixture of hydrogen and oxygen gas at a certain temperature. Use the formula for kinetic energy to explain why the hydrogen molecules move faster than the oxygen molecules. Then explain why there's no hydrogen in the earth's atmosphere, and why the moon has no atmosphere at all. Choices: - mass - velocity - density - temperature A:

Ans:
temperature
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