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  3. as fishes evolved in to amniotes, fertilzation:

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

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Medical Sciences

  1. As fishes evolved in to amniotes, fertilzation:

    evolved from external to internal

    remained internal

    evolved from internal to external

    remained external

1 points   

QUESTIO14

  1. Calcified teeth originated in the first:

    vertebrates

    gnathostomes

    chordates

    animals

1 points   

QUESTION13

  1. When fossil evidence is taken to account, a bony skeletonappeared first in the:

    first osteichthyans

    first gnathostomes

    first chordates

    first vertebrates

1 points   

QUESTION 22

  1. 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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