Question

What are the various evidences in the favour of evolution?

Answer 1

Evolution:

1. In biology, evolution refers to the change in a species' features over numerous generations as a result of natural selection.
2. The premise behind the idea of evolution is that all species are interconnected and change over time.
3. Over repeated generations, evolution is defined as a change in the heritable traits of biological populations.
4. These traits are the manifestations of genes that are handed down from one generation to the next during reproduction.
5. The five types of evidence for evolution discussed in this section include fossil layers, living animal similarities, DNA similarities, and embryonic similarities.

1. Remnants of ancient species:

1. Fossils are being researched today to learn more about life in the past and how it relates to life now.
2. They provide important details regarding evolution and the origins of life.

2. Study of fossil layers:

1. Fossil layers are sedimentary rock strata that include fossils.
2. Sedimentary rock is a type of rock that forms in layers when sediments are deposited and pressed on top of one another.

3. Divergent evolution:

1. When two creatures with a shared ancestor evolve into separate species, this is known as divergent evolution.
2. Bats and mice, for example, have a recent shared ancestor, but diverging evolution has separated them into two distinct species.
3. Such organisms are also called homologous organisms.
4. Bat wings are about the size of a mouse's front paws, but they've expanded out and formed a meaty webbing.
5. Bat wings and mouse paws are homologous structures or body parts that originated from the same source but no longer perform the same function.

4. Convergent evolution:

1. Convergent evolution takes place when two animals with no recent common ancestor adapt to a similar ecological niche and become more similar.
2. The organisms have convergent phenotypes, and homologous structures are similar structural shapes (such as bird wings and bat wings).

5. Embryological similarities:

1. Embryology is the study of one sort of evolutionary evidence.
2. In its earliest stages, an embryo is an unborn (or unhatched) animal or human young.
3. Many various kinds of animal embryos, such as mammals, birds, reptiles, and fish, seem extremely similar, and it can be difficult to tell them apart.
4. Many characteristics of one species can be found in the embryo of another. Fish and human embryos, for example, both have gill slits.
5. They grow into gills in fish, but they vanish before birth in humans.