General Biology: Definitions and explanations page 9 PDF | Download eBooks
Learn general biology terms with definitions and explanations, biology terminologies (Page 9) for biology degree programs.
- What is Paleontology?
Paleontology, sometimes spelled paleontology is the scientific study of life that existed prior to, and sometimes ... - What are Adaptations?
An adaptation is a characteristic of an organism that improves its chances of surviving and/or reproducing. ... - What is Natural selection?
Natural selection is the differential survival and reproduction of individuals due to differences in phenotype. it ... - What is Artificial selection?
Artificial selection is also termed as selective breeding. the breeding of plants and animals is done ... - What is Homology?
Homology is the existence of shared ancestry between a pair of structures, or genes, in different ... - What are Homologous structures?
A homologous structure is an example of an organ or bone that appears in different animals, ... - What is Vestigial structures?
A "vestigial structure" or "vestigial organ" is an anatomical feature or behavior that no longer seems ... - What is Evolutionary tree?
An evolutionary tree is also called a phylogenetic tree. it is a diagram that represents evolutionary ... - What are Convergent evolution?
Convergent evolution is the process whereby organisms not closely related (not monophyletic), independently evolve similar traits ... - What is Analogous features?
He term analogous structures pertain to the various structures in different species having the same function ... - What is Biogeography?
Biogeography is the study of the distribution of species and ecosystems in geographic space and through ... - What is Pangea?
Pangaea or pangea was a supercontinent that existed during the late paleozoic and early mesozoic eras. ... - What is Genetic variation?
Genetic variation describes the difference in dna among individuals. there are multiple sources of genetic variation, ... - What is Microevolution?
Microevolution is the change in allele frequencies that occurs over time within a population. this change ... - What is Neutral evolution?
The neutral theory of molecular evolution holds that most evolutionary changes at the molecular level, and ... - What is Population?
Population is the number of living this that inhabit an area. the individuals belonging to a ... - What is Gene pool?
A gene pool is the collection of different genes within an interbreeding population. the term gene ... - What is Hardy Weinberg equilibrium?
It states that the allele and genotype frequencies in a population will remain constant from generation ... - What is Adaptive evolution?
Evolution in general is a change in the heritable characteristics present in a population. several factors ... - What is Genetic drift?
Genetic drift is the change in the frequency of an existing gene variant in a population ... - What is Founder effect?
The founder effect basically describes the loss of genetic variation that occurs when a new population ... - What is Bottleneck effect?
A population bottleneck or genetic bottleneck is a sharp reduction in the size of a population ... - What is Gene flow?
The gene flow is also known as gene migration or allele flow. it is the transfer ... - What is Relative fitness?
The fitness of an organism is the quantitative representation of natural and sexual selection within evolutionary ... - What is Directional selection?
Directional selection is common when a population's environment changes or when members of a population migrate ... - What is Disruptive selection?
A good example of disruptive selection is a population of black-bellied seed cracker finches in cameroon ... - What is Stabilizing selection?
An example of stabilizing selection is the birth weight of human babies which is usually in ... - What is Sexual selection?
Sexual selection is a mode of natural selection where members of one biological sex choose mates ... - What is Sexual dimorphism?
Sexual dimorphism is the condition where the two sexes of the same species exhibit different characteristics ... - What is Intrasexual selection?
A good example of intrasexual selection is when a single male may patrol a group of ... - What is Intersexual selection?
Intersexual selection is when one biological member chooses the other based on certain appearance or fitness ... - What is Balancing selection?
Balancing selection refers to a number of selective processes by which multiple alleles are actively maintained ... - What is Heterozygote advantage?
A heterozygote advantage describes the case in which the heterozygous genotype has a higher relative fitness ... - What is Frequency dependent selection?
Frequency-dependent selection is an evolutionary process by which the fitness of a phenotype depends on its ... - What is Speciation?
Speciation is the evolutionary process by which populations evolve to become distinct species. speciation may also ... - What is Prezygotic barrier?
Prezygotic barriers typically act in one of three ways. firstly, by impeding members of different species ... - What are Postzygotic barriers?
Postzygotic reproductive barriers occur after the zygote has formed which mean they either reduce the viability ... - What is Morphological species concept?
Morphological species concept actually characterizes a species by body shape and other structural features and is ... - What is Ecological species concept?
The ecological species concept is a concept of species in which a species is a set ... - What is Phylogenetic species concept?
This concept of a species describes species as an irreducible group whose members are descended from ... - What is Allopatric speciation?
An example of allopatric speciation is the water level in a lake that subsides, resulting in ... - What is Polyploidy speciation?
By definition, polyploidy just means that a cell or organism contains more than 2 pairs of ... - What is Autoploidy?
An autopolyploid nucleus is a type of polyploid nucleus which, is formed when the single cell ... - What is Alloploidy?
The allopolyploid nucleus also has multiple copies of the genome. this happens when more than the ... - What is Hybrid zone?
Hybrid zones are areas where the hybrid offspring of two divergent taxa are prevalent and there ... - What is Protocells?
A protocell is a self-organized, endogenously ordered and spherical collection of lipids which has been proposed ... - What are Hydrothermal vents?
A hydrothermal vent is a fissure on the seafloor from which geothermally heated water issues. hydrothermal ... - What are Alkaline vents?
In the absence of oxygen, alkaline vents are proposed to have acted as electrochemical flow reactors, ... - What is Radiometric dating?
Radiometric dating or radioisotope dating is a technique used to date materials such as rocks or ... - What is Half life?
Half-life is the time required for a quantity to reduce to half its initial value. the ... - What are Stromatolites?
Stromatolites or stromatoliths are layered mounds, columns, and sheet-like sedimentary rocks that were originally formed by ... - What are Plate tectonics?
Plate tectonics is the theory that earth's outer shell is divided into several plates that glide ... - What is Mass extinction?
Mass extinction is a widespread and rapid decrease in the biodiversity on earth. such an event ... - What is Adaptive radiation?
In evolutionary biology, adaptive radiation is a process in which organisms diversify rapidly from an ancestral ... - What is Heterochrony?
In evolutionary developmental biology, heterochrony is a developmental change in the timing or rate of events, ... - What are Homeotic genes?
Homeotic genes are genes which regulate the development of anatomical structures in various organisms such as ... - What is Phylogeny?
A phylogenetic tree or evolutionary tree is a branching diagram or "tree" showing the evolutionary relationships ... - What is Taxonomy?
Taxonomy is the science of defining and naming groups of biological organisms on the basis of ... - What is Binomial?
Binomial nomenclature, also called binominal nomenclature or binary nomenclature, is a formal system of naming species ... - What is Analogy?
In biology, similarity of function and superficial resemblance of structures that have different origins are called ...