Evolutionary Bio Flashcards
natural selection
he studied the animals in the galapagos islands
charles darwin
each species produces more offspring than can survive
fittest offsping survives
on the origin of species
was the one who said that acquired traits were inherited and passed on to the offspring
john baptiste de lamarck
use it or lose it
law of use and disuse
study of fossils
paleontology
study of the distribution of flora and fauna
biogeograpy
study of the development of an organism
embryology
study of the anatomy of various animals
comparative anatomy
similar structure, different function
homologous structures
similar function, different structure
analogous structures
similarity at the molecular level
molecular biology
differences in each person
no two individuals in a population have identical sets of alleles
genetic variability
when individuals with traits on one side of the mean in their population survive better or reproduce more than those in the other
directional selection
organisms in a population w/ extreme traits are eliminated
stabilizing selection
favors both the extremes and selects against common traits
disruptive selection
group of organisms that can reproduce with one another in nature and prodcue fertile offspring
species
process by which two unrelated and dissimilar species come to have similar traits because they have been exposed to similar selective pressure
convergent evolution
even with all the shuffling of genes, the relative frequencies of genotypes in a population still prevail over time
hardy-weinberg law
any process that living things use to actively maintain fairly stable conditions necessary for survival
homeostasis
loops act to oppose the stimulus
negative feedback
moves a system further away from the target of equilibrium
positive feedback
when an egg is fertilized by a sperm, it forms a diploid cell called a zygote
morphogenesis
early genes that turn certain cells into future this that
homeotic genes
subset of homeotic genes
hox genes