The structure and biochemistry of chloroplasts in red algae are most like the structure and biochemistry of chloroplasts in which of the following organisms?

a. golden algae
b. diatoms
c. dinoflagellates
d. green algae
e. brown algae


Ans: d. green algae

Biology & Microbiology

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Thermoregulation depends on monitoring of blood temperature. What structure acts as the mammalian temperature sensor?  

A.  hypothalamus B.  peripheral blood vessels C.  adrenal medulla D.  anterior pituitary gland E.  thyroid

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Sharks differ from most other fish in that they lack ____

a. gill slits b. scales c. bone d. paired appendages e. teeth

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The major components of Earth’s atmosphere, from the lowest concentration to the greatest concentration, are:a

carbon dioxide, oxygen, and nitrogen. b. carbon dioxide, nitrogen, and oxygen. c. nitrogen, oxygen, and carbon dioxide. d. nitrogen, carbon dioxide, and oxygen. e. oxygen, nitrogen, and carbon dioxide.

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Which species of Homo is most closely related to the Australopithecines?

A. habilis B. ergaster C. erectus D. sapiens

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