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Umn Biol 1003 Exam 1 Detailed Questions And Expert Answers
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Umn Biol 1003 Exam 1 Detailed Questions And Expert Answers
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Umn Biol 1003 Exam 1 Detailed QuestionsAnd Expert Answers
Evolution - ANS Change over time; the process by which modern organisms have
descended from ancient organisms. Both a fact and a theory
natural selection - ANS A process in which individuals that have certain inherited
traits tend to survive and reproduce at higher rates than other individuals because
of those traits.
Vestigial Traits - ANS are anatomical features that are either no longer in use, or
their use has been greatly reduced or altered.
provide clues to an organism's history by suggesting what features were useful in
the past, and by linking an organism to other, related organisms.
Mutations - ANS a random error in gene replication that leads to a change. These
changes are random for the most part. Some are positive or negative or neutral
and the level to which it affects a phenotype varies but is for the most part benign
if not neutral
germline mutation - ANS DNA alteration occurring in gametes that can be
transmitted to offspring
, founder effect - ANS change in allele frequencies as a result of the migration of a
small subgroup of a population. The founder's genes will carry on since they
started the new population
Gene flow - ANS any movement of genes from one population to another and is an
important source of genetic variation. Occurs when individuals move between
populations
Analogies - ANS are anatomical features that different types of organisms share
generally caused when different organisms share features as responses to a similar
environment
Adaptions - ANS a feature that is common in a population because it provides
some improved function. Adaptations are well fitted to their function and are
produced by natural selection.
a behavior that allows better evasion of predators and survival
Specifically refers to evolutionary change as a result of adaptations related to mate
attraction, copulation itself, or mate retention
(Males compete for access to females, the amount of time spent mating with
females, and even whose sperm gets to fertilize her eggs.
Females choose which males to mate with, and involves adaptive change). - ANS
Sexual Selection
Homologies - ANS Similarities between organisms based on descent from a
common ancestor.
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