Drag each characteristic or feature to the correct location on the diagram.
Sort the features and characteristics by the groups they are found in.

external fertilization
metamorphosis
spinal cord
scales
ectothermic
amniotic eggs
gills in adults
lungs in adults
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Animals: Mastery Test
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external fertilization : fish (exception of some sharks), amphibiansmetamorphosis : insects, amphibians, echinoderms and starfishspinal cord : all vertebratesscales : reptiles, fish, mammals, birdsectothermic : fish, amphibians, reptilesamniotic eggs : birds, mammals, reptilesgills in adults : fishlungs in adults: mammals, birds, reptiles, amphibians

Explanation:

External fertilization is fertilization i.e. fusion of egg and sperm outside the body of the female. This usually occurs in fish and amphibians. Metamorphosis refers to the developmental stages of insects, amphibians and echinoderms. It involves continuous change in shape or form during the life cycle.A spinal cord protected by the vertebral column is a feature of all vertebrates.Ectothermic animals are cold blooded i.e. they cannot regulate their body temperatures. Their body temperature changes with external changes.Amniotic eggs refer to eggs with a yolk or amniotic sac around the embryo. The amniotic sac protects the embryo. In the case of birds, it provides nutrients.  

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