The dark middle layer of the eye that prevents the scattering of light is the ____

a. fovea
b. retina
c. sclera
d. choroid
e. cornea


ANSWER: d

Biology & Microbiology

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The bonding of two amino acid molecules to form a larger molecule requires the _____

A) release of a water molecule B) release of a carbon dioxide molecule C) addition of a carbon dioxide molecule D) addition of a water molecule E) addition of a water molecule and a carbon dioxide molecule

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The vampire squid was placed in the order Vampyromorpha on account of:

a. it has ten arms, but looks like an octopus. b. it appears to drift rather than actively swim. c. it has tentacles that can be coiled up. d. all the above

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An antimicrobial with a low therapeutic index is a safer choice compared to a drug with a high therapeutic index.

Answer the following statement true (T) or false (F)

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Which pair demonstrates a mutualistic relationship?

a. orchid and its host b. rhizobia and strawberry plants c. soil fungus and soil bacteria d. mistletoe and its host e. mychorrhizae and roots

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