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Which organisms are closely related based on their embryos developing with similarities?
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What similarities and differences could you look at when you classify organisms?
Organisms are classified by their: * physical structure (how they look) * evolutionary relationships * embryonic similarities (embryos) * genetic similarities (DNA) * biochemical similarities
Why does comparative embryology show similarities between organisms that do not appear to be similar as adults?
Comparative embryology is the study of the similarities and differences in the embryos of different species. Similarities in embryos are evidence of common ancestry. All vertebrate embryos, for example, have gill slits and tails. All of the animals except for fish, lose their gills slits by adulthood. Some of them also lose their tail. In humans, the tail is reduced to the tail bone. Thus, similarities organisms share as embryos may be gone by adulthood. This is why it is valuable to compare organisms in the embryonic stage
What is the source of nourishment for developing fish embryos is?
what is the source of nourishment for developing fish embryos?
What do developing embryos require for survival?
Embryos dont need to survive.
How does comparing the embryos of different organisms support the theory of evolution?
The stages of development of the embryos of certain organisms are extremely similar, a fact that suggests the organisms had common ancestors.
What two things do all developing embryos need?
Two thing embryos need are nutrients and protection
Do all organisms start out as embryos?
No, not all organisms start out as embryos. Embryos are typically seen in higher animals that undergo sexual reproduction, where a fertilized egg develops into an organism. Organisms like bacteria and protists reproduce asexually and do not have an embryonic stage in their life cycle.
What body system nutures and protects developing embryos?
The female reproductive system nurtures and protects developing embryos. The circulatory and endocrine systems also have a role in this nurture and protection.
What do all vertebrate organisms have in common when they are embryos?
pouches
How embryos help identify a common ancestor of different organisms?
we compared their bone.
What is found in all chordates and provides support in embryos and in some adult organisms?
Notochord
Where do developing embryos of animals get their food from?
If the animal comes from an egg it will get its nutrients from the yolk. If it is a mammal it will get it from the umbilical cord.
