What if the orbit of Darwinism should be a little too circular?
A phenotypic characteristic, acquired during growth and development, that is not genetically based and therefore cannot be passed on to the next generation for example, the large muscles of a weightlifter.
Any heritable characteristic of an organism that improves its ability to survive and reproduce in its environment. Also used to describe the process of genetic change within a population, as influenced by natural selection. A graph of the average fitness of a population in relation to the frequencies of genotypes in it.
Peaks on the landscape correspond to genotypic frequencies at which the average fitness is high, valleys to genotypic frequencies at which the average fitness is low. Also called a fitness surface. A behavior has adaptive logic if it tends to increase the number of offspring that an individual contributes to the next and following generations.
If such a behavior is even partly genetically determined, it will tend to become widespread in the population. Then, even if circumstances change such that it no longer provides any survival or reproductive advantage, the behavior will still tend to be exhibited -- unless it becomes positively disadvantageous in the new environment.
The term can also be applied to larger groups of organisms, as in "the adaptive radiation of mammals. A mode of coping with competition or environmental conditions on an evolutionary time scale.
Species adapt when succeeding generations emphasize beneficial characteristics. A person who believes that the existence of a god or creator and the nature of the universe is unknowable. An umbrella term for various simple organisms that contain chlorophyll and can therefore carry out photosynthesis and live in aquatic habitats and in moist situations on land.
The term has no direct taxonomic significance. Algae range from macroscopic seaweeds such as giant kelp, which frequently exceeds 30 m in length, to microscopic filamentous and single-celled forms such as Spirogyra and Chlorella.
One of the alternative forms of a gene. For example, if a gene determines the seed color of peas, one allele of that gene may produce green seeds and another allele produce yellow seeds. In a diploid cell there are usually two alleles of any one gene one from each parent.
Within a population there may be many different alleles of a gene; each has a unique nucleotide sequence. The relation between the size of an organism and the size of any of its parts. For example, an allometric relation exists between brain size and body size, such that in this case animals with bigger bodies tend to have bigger brains.
Allometric relations can be studied during the growth of a single organism, between different organisms within a species, or between organisms in different species.
Speciation that occurs when two or more populations of a species are geographically isolated from one another sufficiently that they do not interbreed. Living in separate places. The unit molecular building block of proteinswhich are chains of amino acids in a certain sequence.
There are 20 main amino acids in the proteins of living things, and the properties of a protein are determined by its particular amino acid sequence. A series of amino acids, the building blocks of proteinsusually coded for by DNA. Extinct relatives of cephalopods squid, octopi, and chambered nautilusesthese mollusks had coiled shells and are found in the fossil record of the Cretaceous period.
The group of reptiles, birds, and mammals.The theory of evolution is a naturalistic theory of the history of life on earth (this refers to the theory of evolution which employs methodological naturalism and is taught in schools and universities).
Merriam-Webster's dictionary gives the following definition of evolution: "a theory that the various types of animals and plants have their origin in other preexisting types and that the.
Elliott is right: from an evidential point of view it appears as though Darwin wrote the Origin backwards. It seems that Darwin should have first made the case that evolution has in fact occurred and that the history of life has a tree structure.
acquired trait: A phenotypic characteristic, acquired during growth and development, that is not genetically based and therefore cannot be passed on to the next generation (for example, the large.
Introduction to Evolutionary Biology This essay is a must-read for anyone who wants to participate in initiativeblog.coms. It lays out the land for evolutionists and creationists alike, presenting the ideas behind and the evidence for biological evolution.
The theory of evolution is a naturalistic theory of the history of life on earth (this refers to the theory of evolution which employs methodological naturalism and is taught in schools and universities).
Merriam-Webster's dictionary gives the following definition of evolution: "a theory that the various types of animals and plants have their origin in .
The theory of evolution is regarded as one of the greatest glimmerings of understanding humans have ever had. It is an idea of science, not of belief, and therefore undergoes constant scrutiny and testing by argumentative evolutionary biologists.