For coral reefs to form in tropical waters, it is necessary for the coral animals to live in symbiosis with:a

bacteria.
b. parrot fish.
c. zooxanthellae.
d. sea urchins.
e. kelp.


C

Biology & Microbiology

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Menstrual flow results in the discharge of ____

a. the follicle b. the corpus luteum

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Which stage(s) show(s) the diploid portion of

the life cycle? a. A b. B c. C d. D e. D and E

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Which of the following causes heartburn?

a. the pyloric sphincter remaining too tightly closed b. the gastroesophageal sphincter remaining a little open c. the pyloric sphincter remaining a little open d. the gastroesophageal sphincter remaining too tightly closed

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Which of the following principles associated with the theory of island biogeography can be helpful to individuals designing parks and reserves?

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