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How are vertebrate embryos evidence of evolution?
All vertebrate embryos look roughly the same, showing that they come from a common ancestor.
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
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.
Why do all vertebrate embryos develope in a similar way?
All vertebrate embryos develop in a similar way due to shared evolutionary ancestry and the conservation of genetic and developmental pathways. These common pathways are governed by highly conserved genes, such as those in the Hox gene family, which dictate body plan and organ development. Additionally, similar embryonic structures, like the notochord and pharyngeal arches, reflect evolutionary adaptations that have been preserved throughout vertebrate history. This similarity underscores the concept of a common vertebrate lineage from which diverse species have evolved.
Do all living organisms have insulin?
No, not all living organisms have insulin. Insulin is a hormone that is produced by the pancreas of vertebrates, such as humans and other mammals. Invertebrates and other non-vertebrate organisms do not have insulin as it is a hormone specific to vertebrate metabolism.
What do these vertebrate groups have in common?
all vertebrate have a spinal cord.
Are All embryos of every species identical?
No, all embryos of every species are not identical. While many embryos share similar developmental stages due to common evolutionary ancestry, they exhibit distinct characteristics that reflect their species' unique genetic and developmental pathways. For example, vertebrate embryos may show similarities in early stages, but as they develop, species-specific traits become evident. Thus, while there are commonalities, each species has unique embryonic features.
How do embryos provide evidence for evolution?
Embryos provide evidence for evolution by showing similarities in early development among different species, suggesting a common ancestry. This supports the idea that all living organisms have evolved from a shared ancestor over time.
What is found in all chordates and provides support in embryos and in some adult organisms?
Notochord
Is a Common toad a vertebrate or an invertebrate?
Toads have a spinal cord and backbone, which means they are vertebrates.
All vertebrate embryos develop gills during one of the many growth phases in their development?
It would be more appropriate to say that all vertebrate embryos develop pharyngeal gill slits during one of the many phases in their embryonic development. This is because while gills are specifically present in fishes, pharyngeal gill slits are a general chordate feature.
Fruit Fly embryos and frog embryos differ from each other more than frog embryos and human embryos do What does this tell us about how the three species are related?
Fruit Flies and frog eggs are long-time,well characterized standbys in the lab environment,and specific manipulations allow researches to introduce genes from other organisms into these species
