If crop productivity decreases during a drought, then crop productivity does what during a drought? Answer choices: - stabilizes - threatened - reduce - increases - decreases - contracting - maintains - It expands
decreases
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If all plants have a characteristic life cycle that includes alternation of descendants, then all of what have a characteristic life cycle that includes alternation of descendants? Answer choices: - Conifers - flowers - apples - plants - amoeba - Trees - Oak - Spruce
plants
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If antibodies can infect and destroy helper T cells, then what can infect and destroy helper T cells? Answer choices: - tissues - anemia - antibodies - cigarettes - flagella - Chemical energy - vipers - adding heat
antibodies
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If some parasites make their host die but most do not, then some parasites, though rarely, make what die? Answer choices: - animals - insects - viruses - bacteria - other parasites - honeybees - chickens - their hosts
their hosts
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