Q: What monthy cycle causes changes in the ovaries and uterus? Choices: - tides - water cycle - sleep-wake cycle - the menstrual cycle A:
the menstrual cycle
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Q: What 2 things keep polar bears warm in their arctic ecosystem? Choices: - hibernation, thick fur - colourful fur , blubber - camouflage, blubber - thick fur, blubber A:
thick fur, blubber
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Q: What are mid-wavelength electromagnetic waves commonly referred to as? Choices: - gamma rays - x-rays - electricity - light A:
light
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Q: Oysters require a certain minimum population density because they must be in close proximity to do this? Choices: - multiply - replicate - feed - reproduce A:
reproduce
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