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hoa [83]
3 years ago
10

Fossil evidence shows that structures considered vestigial in living organisms

Biology
1 answer:
padilas [110]3 years ago
6 0
Vestigial organs are organs that we don't use but maybe our ancestor use this organ and the organ will evolve into smaller. Example : Appendix, Hair in chest, canine.

This theory come from J.B Lamarck
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Answer:

Internal Fertilization: Mammals,birds and reptiles in them the mode of fertilization is internal

External Fertilization: Amphibians and fishes used external fertilization.

Egg laying Animals;Birds,reptiles and some mammals platypus lays eggs.

Explanation:

Fertilization is a process in which a female egg (Ovum) and male egg (sperm) unite to form a zygote.A zygote is a fertilized egg which grows within an embryo.The process of fertilization is important in eukaryotes such as animals, humans,birds and plants. Fertilization divides a cell into many daughter cells by the process of mitosis and meiosis.It doubles the chromosome numbers.Fertilization are of two types internal and external.

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gregori [183]

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4 0
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sladkih [1.3K]

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