Which hypothesis proposes an explanation for the origin of eukaryotic organelles?

a. the endosymbiotic hypothesis
b. the hydrogen hypothesis
c. the origins hypothesis
d. the eukaryotic hypothesis


Answer: A

Biology & Microbiology

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Secondary succession can occur ____

a. after a fire b. on a new sand dune c. on bare rock d. immediately after the formation of an artificial lake e. on a glacier

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Stem cells have the ability to differentiate to form specific cell types, which divide only slowly or not at all

a. True b. False

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Sound amplification happens in the middle ear because of ________

A) size difference between the eardrum and oval window B) lever action of the ossicles C) resonance in the efferent outer hair cells D) stapedial reflex

Biology & Microbiology