BIOL 1113 Study Guide - Midterm Guide: Heterotroph, Genetic Code, Gamete

• School: Northeastern University
• Department: Biology
• Course: BIOL 1113
• Professor: Mary- Susan Potts- Santone

Document Summary

Invertebrates flourish in ocean: age of fishes. John ray = 1t thorough study of natural world: carolus linnaeus, fixity of species, each species had: Interactions w/ environment determine who reproduces more: adaptation, changes that help a species become more suited to its environment, production of natural selection. Individuals select mates via their phenotype, reject the opposite. Increases # of homozygotes: dissociative mating, dissimilar phenotypes, genetic drift. Inheritance: variation, differential adaptiveness (some differences affect ability to survive, differential reproductiveness (some differences affect likelihood of successful reproduction, results in, change in allele frequencies in gene pool. Improved fitness of population: types of selection, directional selection. Individuals at an extreme of phenotypic range have greater reproductive success in particular environment: curve shifts in that direction, stabilizing selection. In many species, male characteristics affected more intensely than female. Intrasexual = same sex: males directly compete for mating opportunities or territories.