Q: What size of ring will a summer drought cause in a tree? Read this paragraph and choose the correct option from the provided answers: You can tell other things from tree rings too. In a good year a tree will produce a wide ring. A summer drought will produce a smaller ring. These variations will appear in all trees in a region. The same pattern can be found in all the trees in the area. This pattern helps scientist to identify a particular time period. Choices: - giant - larger - medium - smaller A:
smaller
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Q: What consists of a nitrogen atom bonded to some combination of carbons and hydrogens? Read this paragraph and choose the correct option from the provided answers: An amine consists of a nitrogen atom bonded to some combination of carbons and hydrogens. Choices: - an alkali - a metalloid - a chloride - an amine A:
an amine
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Q: What purpose does the appendix serve in humans today? Read this paragraph and choose the correct option from the provided answers: Structures like the human tail bone are called vestigial structures . Evolution has reduced their size because the structures are no longer used. The human appendix is another example of a vestigial structure. It is a tiny remnant of a once-larger organ. In a distant ancestor, it was needed to digest food. It serves no purpose in humans today. Why do you think structures that are no longer used shrink in size? Why might a full-sized, unused structure reduce an organism's fitness?. Choices: - work - filters blood - digests food - none A:
none
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Q: What glands in the breast secrete milk? Read this paragraph and choose the correct option from the provided answers: The breasts are not directly involved in reproduction, but they nourish a baby after birth. Each breast contains mammary glands, which secrete milk. The milk drains into ducts leading to the nipple. A suckling baby squeezes the milk out of the ducts and through the nipple. Choices: - primordial glands - adrenal glands - fetal glands - mammary glands A:
mammary glands
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