Answer the following question given this paragraph: Leaf Arrangement The arrangement of leaves on a stem is known as phyllotaxy. The number and placement of a plant's leaves will vary depending on the species, with each species exhibiting a characteristic leaf arrangement. Leaves are classified as either alternate, spiral, or opposite. Plants that have only one leaf per node have leaves that are said to be either alternatemeaning the leaves alternate on each side of the stem in a flat planeor spiral, meaning the leaves are arrayed in a spiral along the stem. In an opposite leaf arrangement, two leaves arise at the same point, with the leaves connecting opposite each other along the branch. If there are three or more leaves connected at a node, the leaf arrangement is classified as whorled. Q: The arrangement of what plant structures can be classified as either alternate, spiral, or opposite? A:
OPTIONS:
- spores
- fruits
- roots
- leaves
leaves
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Answer the following question given this paragraph: Summary By far the most abundant element in the universe is hydrogen. The fusion of hydrogen nuclei to form helium nuclei is the major process that fuels young stars such as the sun. Elements heavier than helium are formed from hydrogen and helium in the interiors of stars. Successive fusion reactions of helium nuclei at higher temperatures create elements with even numbers of protons and neutrons up to magnesium and then up to calcium. Eventually, the elements up to iron-56 and nickel-58 are formed by exchange processes at even higher temperatures. Heavier elements can only be made by a process that involves multiple neutron-capture events, which can occur only during the explosion of a supernova. Q: What is the most abundant element in the universe? A:
OPTIONS:
- oxygen
- helium
- fluoride
- hydrogen
hydrogen
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Answer the following question given this paragraph: When normal cells are damaged beyond repair, they are eliminated. The upper diagram depicts damaged cells being destroyed. Cancer cells avoid elimination and, because of uncontrolled cell division, continue to multiply in an unregulated manner. The lower diagram depicts damaged cells dividing in an uncontrolled fashion. Q: What causes cancer cells to avoid elimination and continue to multiply? A:
OPTIONS:
- continuous cell division
- chronic cell division
- persistent cell division
- uncontrolled cell division
uncontrolled cell division
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Answer the following question given this paragraph: Nebulae can be spotted with the naked eye or simple telescopes. Q: What is one method to observe nebulae? A:
OPTIONS:
- mirror
- kaleidoscope
- microscope
- telescope
telescope
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