S: (n) dominance (the organic phenomenon in which one of a pair of alleles present in a genotype is expressed in the phenotype and the other allele of the pair is not)
S: (n) dehiscence ((biology) release of material by splitting open of an organ or tissue; the natural bursting open at maturity of a fruit or other reproductive body to release seeds or spores or the bursting open of a surgically closed wound)
S: (n) exfoliation (the peeling off in flakes or scales of bark or dead skin) "exfoliation is increased by sunburn"
S: (n) diapedesis (passage of blood cells (especially white blood cells) through intact capillary walls and into the surrounding tissue)
S: (n) facilitation ((neurophysiology) phenomenon that occurs when two or more neural impulses that alone are not enough to trigger a response in a neuron combine to trigger an action potential)
S: (n) food chain ((ecology) a community of organisms where each member is eaten in turn by another member)
S: (n) food pyramid ((ecology) a hierarchy of food chains with the principal predator at the top; each level preys on the level below)
S: (n) food web, food cycle ((ecology) a community of organisms where there are several interrelated food chains)
S: (n) gene expression (conversion of the information encoded in a gene first into messenger RNA and then to a protein)
S: (n) histocompatibility (condition in which the cells of one tissue can survive in the presence of cells of another tissue) "a successful graft or transplant requires a high degree of histocompatibility"
S: (n) life (the organic phenomenon that distinguishes living organisms from nonliving ones) "there is no life on the moon"
S: (n) life cycle (a series of stages through which an organism passes between recurrences of a primary stage)
S: (n) pleomorphism ((biology) the appearance of two or more distinctly different forms in the life cycle of some organisms)
S: (n) polymorphism ((biology) the existence of two or more forms of individuals within the same animal species (independent of sex differences))
S: (n) polymorphism ((genetics) the genetic variation within a population that natural selection can operate on)
S: (n) recognition ((biology) the ability of one molecule to attach to another molecule that has a complementary shape) "molecular recognition drives all of biology, for instance, hormone and receptor or antibody-antigen interactions or the organization of molecules into larger biologically active entities"
S: (n) rejection ((medicine) an immunological response that refuses to accept substances or organisms that are recognized as foreign) "rejection of the transplanted liver"
S: (n) rejuvenation, greening (the phenomenon of vitality and freshness being restored) "the annual rejuvenation of the landscape"
S: (n) sex linkage (an association between genes in sex chromosomes that makes some characteristics appear more frequently in one sex than in the other)
S: (n) life cycle (the course of developmental changes in an organism from fertilized zygote to maturity when another zygote can be produced)