__________ such as reptiles control core temperature mainly by behavior. Fill in the blank(s) with the appropriate word(s)
ANSWER: Ectotherms
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A female cat in heat urinates more often and in many places. Male cats are attracted to the urine deposits. Which of the following is a proximate cause of this increased urination?
A) It announces to the males that she is in heat. B) Female cats that did this in the past attracted more males. C) It is a result of hormonal changes associated with her reproductive cycle. D) The female cat learned the behavior from observing other cats.
Plant surfaces are covered and protected by
a. ground tissue. b. protoderm. c. vascular tissue. d. meristem. e. dermal tissue.
When you bring your hand to your shoulder, your biceps muscle ____ and your triceps muscle ____
a. contracts; relaxes b. relaxes; contracts c. contracts; contracts d. relaxes; relaxes e. lengthens; shortens
During the first stage of labor, the amnion becomes effaced to allow the fetal head to pass through. Indicate whether the statement is true or false