Homology in this context simply means similarity. The implication for humans is still being researched, but evidence indicates that mild fevers can have a number of important immunological functions that allow us to better fight bacterial and viral infections.
A small, tree-dwelling primate that belongs to the group called prosimians. The reproductive cells in an organism, or the cells that produce the gametes.
A member of the group of primates made up of monkeys, apes, and humans. His current research interests include hominid evolution, paleoecology, and taphonomy. His research includes work on Lucy Australopithecus afarensis. While Lyell initially opposed the idea of evolution, he came to accept it after Darwin published On the Origin of Species.
The 19th-century naturalist considered the father of evolution. A geologist whose work includes the study of geological processes at a range of scales, from the smallest nanometer to broader-scale interpretations of the history experienced by geological materials.
The group of reptiles, birds, and mammals.
Any heritable characteristic of an organism that improves its ability to survive and reproduce in its environment. A 19th-century scientist considered a father of modern geology. Quirky facts add interest. It is the starting point for much of the theory of population genetics. An interaction between the genes at two or more locisuch that the phenotype differs from at would be expected if the loci were expressed independently.
Each individual is assigned to a species, genus, family, order, class, phylum, and kingdom, and some intermediate classificatory levels. A cladogram branches like a family tree, with the most closely related species on adjacent branches. The Hox genes are very ancient and widely shared among bilateral animals.
Partly or wholly determined by genes; capable of being passed from an individual to its offspring. Broadly, the proportion of variation more strictly, variance in a phenotypic character in a population that is due to individual differences in genotypes.
Changes in the frequencies of alleles in a population that occur by chance, rather than because of natural selection. A condition in which the haplotype frequencies in a population deviate from the values they would have if the genes at each locus were combined at random.
The amnion surrounds the embryo with a watery substance, and is probably an adaptation for breeding on land. The original form or body plan from which a group of organisms develops.
Modern humans, which evolved to their present form aboutyears ago. An object made by humans that has been preserved and can be studied to learn about a particular time period.
A psychologist and professor at Harvard and Oxford Universities, and a prolific author whose book, The Process of Education, encouraged curriculum innovation based on theories of cognitive development.
The increased difference between two closely related species where they live in the same geographic region sympatry as compared with where they live in different geographic regions allopatry. Along with lycophytes and ferns, horsetails were among the first terrestrial plants to appear.
A zoologist and professor with interests in evolution and how it affects geographic variation. They arose in the Lower Ordovician between and million years agoand fossil crinoids are an important constituent of Palaeozoic limestones. Compare with haploid and polyploid. His research emphasizes combining data from living and fossil organisms to study the origins and fates of lineages and adaptationsto develop an understanding of the underlying dynamics of speciation and extinction that could lead to a general theory of evolutionary novelty.
Homology that evolved before the common ancestor of a set of speciesand which is present in other species outside that set of species. A natural phenomenon repeatedly confirmed by observation.
They likewise talk about percent homology between the two sequences. Synonym for reproductive isolation. The process by which humans breed animals and cultivate crops to ensure that future generations have specific desirable characteristics.
United We Stand illustrated by Simon Basher Unique, comprehensive guide to 50 states plus DC and the six territories presents each state in the hip Basher fashion. An extinct marine invertebrate that was related to squid, octopi, and chambered nautiluses.
A point on a chromosome that is involved in separating the copies of the chromosome produced during cell division.Hot Topics Science Reading List! From the Young Scientists through Horrible Science to Genetics, Physics and Inventions - science for all ages.
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.Download