Any worm of the phylum Chaetognatha, commonly called an arrowworm.This is a transparent marine worm with horizontal lateral and caudal fins and a row of movable curved spines at each side of the mouth. Used in phylogenetic analysis and to study the evolution of traits over time.
Member of a major animal phylum of solitary gelatinous marine animals commonly called comb jellies or sea gooseberries (phylum Ctenophora).
A B C A mathematical approximation that describes diffusion using a differential equation.
It describes the spread of chemical concentration or allele frequency through physical space and also the spread of a probability distribution through the space of allele or genotype frequencies.
A simple model for the evolution of reproductive isolation in which two populations accumulate different alleles.
These alleles cause no loss of fitness within the genetic background in which they arose, but derived alleles from different populations are incompatible with each other.