Analysis of mitochondrial DNA from different species of stickleback fish in three lakes disproves the

hypothesis of a common ancestor for all three species.
__________________ Indicate whether the statement is true or false.


F, supports

Biology & Microbiology

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What is the feature of horsetails that was useful before the existence of scouring pads?

a. rhizomes b. silica in the stems c. photosynthetic cells d. cones at the tips e. scale-like leaves

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Jaws and paired fins evolved in early __________. Fill in the blank(s) with the appropriate word(s)

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If the heart has voltage gated K+ channels that are further activated by Ca++, what might be the value of this type of K+ channel?

What will be an ideal response?

Biology & Microbiology

Molars and premolars are used to

a. grind food. b. bite off chunks of food. c. tear food. d. mince food. e. pulverize food.

Biology & Microbiology