Compare And Contrast Darwin's Theory Of Evolution By Natural Selection
The evolutionary process outlines the way that the modern organisms present today have descended from ancient ancestors in their simple life form. One of the first ideas about evolution that was not religious/spiritual came from Jean-Baptiste de Lamarck in 1809. The main concept behind his theory (Lamarck’s Theory) was not too different from Charles Darwin’s Theory of Evolution by Natural Selection which came later in 1859. Both theories suggest that varying traits between individuals of the same species are passed down to offspring and hence, organisms evolve into the versions we see today.
There are four main factors that drive the evolutionary process:
Natural Selection
Mutation
Migration
Genetic Drift
Natural Selection: this is the process …show more content…
As outlined in Part One Table of Observations, the toad has two paratoid glands located on top of the head behind the eyes which contain a milky white poison.
The integumentary system (skin) have similarities and differences for the two species. Both animals have two layers of skin; epidermis and dermis however, their skin is still drastically different. As observed in Part One, toads have dry, leathery, warty skin whereas rats have fine, tiny hairs covering their exterior. This difference in external covering is most likely due to their origins and its climate. As each animal migrated and adapted to its environment, it developed features (adaptations) that would help it survive.
For instance, as rats originated from Europe where the winters are very cold, it can be said that their hair covering developed as a way to provide insulation and heat for the animal. Compared to the toad, which as explained in Part One, originated from Hawaii, it most likely developed its type of skin due to the mild temperatures and moderate …show more content…
The Acanthostega could possibly be this ancestor. These animals are now extinct but once lived in shallow water habitats as a tetrapod (which can be described as a superclass of mammals and amphibians) during the Upper Devonian period (Refer to Figure 2 & 3). The structure of the digits and the long tail is similar to that of a rat and the lack of a neck is similar to the toad. Common ancestry with this animal is possible because as time went on and the environment in which it lived changed, the specie adapted to its environment in different ways across individuals of the same species, giving us the modern forms of the rat and toad we see
There are four main factors that drive the evolutionary process:
Natural Selection
Mutation
Migration
Genetic Drift
Natural Selection: this is the process …show more content…
As outlined in Part One Table of Observations, the toad has two paratoid glands located on top of the head behind the eyes which contain a milky white poison.
The integumentary system (skin) have similarities and differences for the two species. Both animals have two layers of skin; epidermis and dermis however, their skin is still drastically different. As observed in Part One, toads have dry, leathery, warty skin whereas rats have fine, tiny hairs covering their exterior. This difference in external covering is most likely due to their origins and its climate. As each animal migrated and adapted to its environment, it developed features (adaptations) that would help it survive.
For instance, as rats originated from Europe where the winters are very cold, it can be said that their hair covering developed as a way to provide insulation and heat for the animal. Compared to the toad, which as explained in Part One, originated from Hawaii, it most likely developed its type of skin due to the mild temperatures and moderate …show more content…
The Acanthostega could possibly be this ancestor. These animals are now extinct but once lived in shallow water habitats as a tetrapod (which can be described as a superclass of mammals and amphibians) during the Upper Devonian period (Refer to Figure 2 & 3). The structure of the digits and the long tail is similar to that of a rat and the lack of a neck is similar to the toad. Common ancestry with this animal is possible because as time went on and the environment in which it lived changed, the specie adapted to its environment in different ways across individuals of the same species, giving us the modern forms of the rat and toad we see