What does CH2O represent?
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Explain why would a tongue not detect mild sweetness after eating foods with high sweetness?
What is living reservoirs?
in artificial respiration, why 5%carbon dioxide uses with 95%oxygen?
What has caused evolution?
Why mosquito bites?
Name an organ that belongs to more than one organ system?
Explain the main difference between a bird heart and a mammalian heart?
How many different cranial nerves are there in the human body?
What is the difference between living and non-living things?
Biologists usually refer to the head of a tapeworm by what name?
Define light reaction?
What are the names and uses of the various laboratory tools?