The nitrogen bases in dna are held together by?
a. dna bonds
b. ionic bonds
...
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Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above
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This is the interaction of two organisms where one is and the other is neither nor harmed.
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Which of the following are responsible for sending messages from the hypothalamus to the thalamus?
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Support mangrove trees out of the water. a) pneumatophores b) prop roots c) sand dunes d) tide supports
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