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Which statement best explains why dragonflies stand on branches with their head down and abdomen in the air when it is hot during the summer?
A. Dragonflies are ectotherms, so they can't sweat to control their body temperature.
B. Dragonflies are endotherms, so they can't sweat to control their body temperature.
C. Dragonflies are ectotherms, so they store energy in layers of fat and can control their body temperature.
D. Dragonflies are endotherms, so they store energy in layers of fat and can control their body temperature.
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Ascience research group is testing a new type of plant food. one trial is conducted in a controlled experiment. the data from the trial show that the plant that received the new food grew faster than the control plant. the group announces that the new plant food makes plants grow faster. what is the main weakness in this scientific claim?
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Which statement best explains why dragonflies stand on branches with their hea...
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