Ques:Q: Land could not be colonized by other organisms until what became established? Choices: - gases - carbon dioxide - oxygen - plants A:

Ans:plants
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Ques:Q: The basic fabric of most biological membranes is a double layer of _________ and other lipids? Choices: - solids - liquids - antibodies - phospholipids A:

Ans:phospholipids
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Ques:Q: Gated ion channels have a central role in what system's function? Choices: - endocrine - skeletal - generous - nervous A:

Ans:nervous
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Ques:Q: One of the earliest air pumps was made by? Choices: - Isaac Newton - Galileo - Niels Bohr - robert boyle A:

Ans:
robert boyle
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