Unit 2 bio

Question 1

Mutation

Answer 1

Small random error in DNA

Question 2

Migration

Answer 2

Seasonal movement of animals from one region to another

Question 3

Natural selection

Answer 3

Process whereby organisms better adapted to their environment tend to survive & reproduce
environment selecting organisms with best traits

Question 4

Genetic drift

Answer 4

Vacation in the relative frequency of different genotype a in a small population owing to the chance disappearance of particular genes as individuals or do not reproduce

Question 5

Artificial selection

Answer 5

Selection through selective breeding of plants and animals by humans

Question 6

Adaption

Answer 6

A change or the process of change by which organisms or species becomes better suited to its environment

Question 7

Evolution of whales

Answer 7

Most closely land mammal - hippos
Blowhole went to head, legs got shorter and evolved into fins
Started on land and evolved to water mammal

Question 8

Speciation

Answer 8

The formation of a new species

Question 9

Allopatric speciation

Answer 9

Geographic barriers separate members of a group causing them to evolve separately

Question 10

Sympatric speciation

Answer 10

Occurs when a new species develops while sharing the same geographic area as its parent species

Question 11

Fitness

Answer 11

How good a particular genotype is at leaving offspring in the next generation relative to how good other genotypes are at it

Question 12

Evolution

Answer 12

Change in the genetic makeup of a population over time