anisogamy
21anisogamous — adjective Date: 1891 characterized by fusion of heterogamous gametes or of individuals that usually differ chiefly in size < anisogamous reproduction > • anisogamy noun …
22Gamete — A gamete (from Ancient Greek γαμέτης gametes husband / γαμετή gamete wife ) is a cell that fuses with another cell during fertilization (conception) in organisms that reproduce sexually. In species that produce two morphologically distinct types… …
23Sex — An organism s sex is defined by the gametes it produces: males produce male gametes (spermatozoa, or sperm) while females produce female gametes (ova, or egg cells); individual organisms which produce both male and female gametes are termed… …
24Sexual reproduction — is the creation of a new organism by combining the genetic material of two organisms. The two main processes are: meiosis, involving the halving of the number of chromosomes; and fertilization, involving the fusion of two gametes and the… …
25Diatom — For a molecule of two atoms, see Diatomic molecule. Diatoms Marine diatoms Scientific classification Domain …
26Alternation of generations — (also known as alternation of phases or metagenesis) is a term primarily used in describing the life cycle of plants (taken here to mean the Archaeplastida). A multicellular sporophyte, which is diploid with 2N paired chromosomes (i.e. N pairs),… …
27Heterogamy — has a number of biological definitions: *In reproductive biology, heterogamy is the alternation of differently organized generations, applied to the alternation between parthenogenetic and a sexual generation. This type of heterogamy occurs for… …
28The Major Transitions in Evolution — is a book written by John Maynard Smith and Eörs Szathmáry (Oxford University Press, 1995).Maynard Smith and Szathmary identified several properties common to the transitions: # Smaller entities have often come about together to form larger… …
29Evolution of sexual reproduction — The evolution of sexual reproduction is currently described by several competing scientific hypotheses. All sexually reproducing organisms derive from a common ancestor which was a single celled eukaryotic species[1]. Many protists reproduce… …
30Geoff Parker — Professor Geoffrey Alan Parker FRS (born 24 May 1944) is a professor of biology at the University of Liverpool. He has a particular interest in behavioural ecology and evolutionary biology, and is most noted for introducing the concept of sperm… …
