As fishes evolved in to amniotes, fertilzation: evolved from external to internal remained internal evolved from internal to...

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Medical Sciences

As fishes evolved in to amniotes, fertilzation:
evolved from external to internal
remained internal
evolved from internal to external
remained external
1 points Â Â
QUESTIO14
Calcified teeth originated in the first:
vertebrates
gnathostomes
chordates
animals
1 points Â Â
QUESTION13
When fossil evidence is taken to account, a bony skeletonappeared first in the:
first osteichthyans
first gnathostomes
first chordates
first vertebrates
1 points Â Â
QUESTION 22
In most amniotes, the main site of gas exchange is the:
pharynx
skin
lungs

Answer & Explanation Solved by verified expert

4.2 Ratings (531 Votes)

1 evolved from external to internal Explanation The lower vertebrates anamniotes which includes fish and amphibians lay their eggs into water and the external fertilization takes place where as the higher vertebrates amniotes includes See Answer

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		evolved from external to internal
		remained internal
		evolved from internal to external
		remained external

		first osteichthyans
		first gnathostomes
		first chordates
		first vertebrates