A scientist is studying endosymbiosis in cells. This means she is investigating

A. how mitochondria and chloroplasts evolved into eukaryotic cells.
B. how mitochondria and chloroplasts evolved into prokaryotic cells.
C. how mitochondria and chloroplasts were derived from eukaryotic cells.
D. how mitochondria and chloroplasts were derived from prokaryotic cells.


Answer: D

Biology & Microbiology

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Why are most infants with phenylketonuria usually healthy at birth?

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The major cell surface receptor(s) responsible for the attachment of cells to the extracellular matrix is (are)

a. hemidesmosomes. b. desmosomes. c. integrins. d. laminin.

Biology & Microbiology

Alginates are used in many everyday products, including toothpaste and soap. When added to water, they form a thick gel that binds or emulsifies liquids. Alginates come from a group of multicellular stramenopiles that have one pigment that masks all

others and therefore gives these organisms a distinctive, dark color. Alginates are derived from A) green algae. B) brown algae. C) water molds. D) dinoflagellates.

Biology & Microbiology

Put the terms in the correct order for the path food takes in a ruminant.

A. reticulum ? abomasum ? rumen ? omasum B. omasum ? reticulum ? abomasum ? rumen C. abomasum ? rumen ? omasum ? reticulum D. rumen ? reticulum ? omasum ? abomasum

Biology & Microbiology