By: Jerry A. Coyne
What is maturation; chapter I explains Darwins theory of evolution, which applies to all species, new species ar descended from earlier forms. This means that organisms with similar characteristics are likely to generate shared a common ancestor sometime in the past. The more traits shared by organisms, the closer their evolutionary relationship. This commandment of common descent explains why anthropologists are interested in studying nonhuman animals, particularly primates (the mammalian battle array that includes monkeys, apes, and earthly concern), with whom humans share the closest common ancestor.
Some of our crucial human characteristics, such as a spinal corduroy encased in a bony vertebral column, and the assiduousness of nerve cells in a brain, are part of our vertebrate heritage, established in a common ancestor every moorage 600 million years ago. From our mammalian heritage, established over 70 million years ago (though some of these common traits may go back over 200 million years), humans developed internal mechanisms for maintaining a constant body temperature (warm-bloodedness), hair, and a generalized dental pattern that allows a more alter diet than is found among other vertebrates.
The reproductive pattern of mammals is an in particular distinguishing trait: They usually give birth to live result (versus laying eggs), nurse their young with milk produced in the womanishs mammary glands, and have complex social mechanisms for the criminal maintenance of the very young.
All living organisms must cope with the difficulty of how to survive and reproduce within their environments. Adaptation refers to the relationship in the midst of an organism and its environment: When we say that a population is suitable to its environment, we mean it has achieved and maintained a relationship to that environment in which it can survive and reproduce successfully.
Among nonhuman animals, adaptation takes place principally by means of biological...If you want to get a full essay, order it on our website: Orderessay
If you want to get a full essay, wisit our page: write my essay .
No comments:
Post a Comment