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Acceptance or rejection of Mayr's proximate-ultimate distinction may lie at the centre of several major debates within contemporary biology, concerning evo devo (evolutionary developmental biology), niche construction, cultural evolution, human cooperation, and the evolution of language. According to some biologists and philosophers, these ...
New members in twelve-step programs are encouraged to secure a relationship with at least one sponsor who both has a sponsor and has taken the twelve steps themselves. [28] Publications from twelve-step fellowships emphasize that sponsorship is a "one on one" nonhierarchical relationship of shared experiences focused on working the Twelve Steps.
Natural selection is the differential survival and reproduction of individuals due to differences in phenotype.It is a key mechanism of evolution, the change in the heritable traits characteristic of a population over generations.
In biology, epigenesis (or, in contrast to preformationism, neoformationism) is the process by which plants, animals and fungi develop from a seed, spore or egg through a sequence of steps in which cells differentiate and organs form. [1] Aristotle first published the theory of epigenesis in his book On the Generation of Animals.
Alongside the well-known stages of denial, anger, bargaining, depression, and acceptance, Kübler-Ross detailed other "stages" such as shock, partial denial, preparatory grief (also known as anticipatory grief), hope, and decathexis, which refers to the process of withdrawing emotional investment from external objects or relationships. [27]
Marker assisted selection or marker aided selection (MAS) is an indirect selection process where a trait of interest is selected based on a marker (morphological, biochemical or DNA/RNA variation) linked to a trait of interest (e.g. productivity, disease resistance, abiotic stress tolerance, and quality), rather than on the trait itself.
Within the field of developmental biology, one goal is to understand how a particular cell develops into a final cell type, known as fate determination. Within an embryo, several processes play out at the cellular and tissue level to create an organism.
This process of the second bacterial cell taking up new genetic material is called transformation. In molecular biology and genetics, transformation is the genetic alteration of a cell resulting from the direct uptake and incorporation of exogenous genetic material from its surroundings through the cell membrane(s).