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WGU-SSC1 ch 2
Western Governor's University, General Education Social Science, chapter 2
| Question | Answer |
|---|---|
| A process that intervenes to ensure that organisms achieve an adjustment to their enviornment that is beneficial. | adaption |
| A prehuman who lived from about 4.5 million years ago. (researchers disagree on the certainty of this) | Australopithecus |
| Carriers of genes, or the hereditary blueprints of organisms. Each huan inherits a set of 23 chromosomes from each parent. | chromosomes |
| The closest predecessors of perhaps contemporarites of modern humans, who lives about 35,000 years ago. They were expert toolmakers and artisits, and they lived in tribes that displayed evidence of rules and kinship systems. | Cro-Magnon |
| Change in gene frequencies is promoted because an adaptation to a new environment is needed. | directional selection |
| Deoxyribonucleic acid. A complex biochemical substance that is the basic building block of life. it determines the inheritance of specific traits. | DNA |
| Period of sexual receptivity and ability to conceive. | estrus |
| A theory that explains change in living organisms and variation within species. Evolution functions according to processes of natural selection, mutation, genetic drift, gene flow, and speciation. | evolution |
| The movement of genes from one gene pool to another. It results in new combinations of genes in the offspring. | gene flow |
| The proportion in which the various genes occur in an inbreeding population. | gene frequency |
| All of the genetic material available to a population to be inherited by the next generation. | gene pool |
| Hereditary unites that transmit an individual's traits. They are contained in the chromosomes and made up of DNA. | genes |
| The fluctuations in frequencies of specific traits in a small, isolated population, so that visible differences between an isolated population and the population from which it broke away become obvious. | genetic drift |
| The science of heredity. | genetics |
| The actual genetic composition of an organism, which is not necessarily expressed. | genotype |
| Prehuman creatures who walked on two feet. | hominids |
| The upright hominid thought to be a direct ancestor of modern humans. | Homo erectus |
| A species whose fossils date back 75,000 years (or perhaps 195,000 years) and includes Neanderthals. The species label for modern humans is Homo sapiens sapiens, whose fossils date back 30,000 year and include Cro-Magnon. | Homo sapiens |
| A permanent change in genetic material. | mustation |
| A process of evolution in which random traits are tested for their survival value; the successful traits eventually become extinct. | natural selection |
| A subspecies of Homo sapiens (but some consider them hominids) whose fossil remains date from 70,000 to 35,000 years ago. They are known to have buried their dead. | Neanderthal |
| The physical, or outward, appearance of an organism. | phenotype |
| An order of mammals to which monkeys, apes, and humans belong. | primates |
| a hominoid having hominid-like features, dated between 14 and 18 million years ago. | Ramapithecus |
| When natural selection promotes the status quo rather than change, because change would be determined to the organism's adaption to its environment. | stabilizing selection |
Created by:
marquez817
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