The first jawed fish were the:a

placoderms.
b. acanthodians.
c. ostracoderms.
d. chrondrichthyes.
e. agnatha.


B

Environmental & Atmospheric Sciences

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The sea cave in this photograph formed by



A) erosion of a promontory by waves.
B) erosion by blowing beach sand.
C) removal of rocks by giant lobsters.
D) a rapid drop in sea level.

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What is the difference between an endotherm and an ectotherm?

What will be an ideal response?

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Speed divergence is

A) most common with anticyclones. B) straight-line acceleration of upper-level winds. C) the spreading out of upper-level winds. D) primarily a fair-weather phenomenon. E) primarily a surface-level phenomenon.

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The most abundant intrusive ingenious rock found at the earths surface is:

What will be an ideal response?

Environmental & Atmospheric Sciences