U4P1

Question 1

age of the earth

Answer 1

4.5 billion years old

Question 2

Darwin observed

Answer 2

different species of finches observed came from Galapagos Islands and shared common ancestor

Question 3

adaptation

Answer 3

process by which a population becomes better suited to its environment

Question 4

descent with modification

Answer 4

occurs because of natural selection

Question 5

natural selection

Answer 5

process by which organism with traits more suitable survives and reproduces more successfully

Question 6

parts of natural selection

Answer 6

overproduction, genetic variation, struggle to survive, differential reproduction

Question 7

how do populations of same species living in different places adapt in relation to one another

Answer 7

adapt to different things due to differing environments

Question 8

three vestigial structures in humans

Answer 8

tailbone, appendix, Darwin’s point

Question 9

occurrence of same of very similar amino acid sequence for a protein in a group of species

Answer 9

provides evidence that these species share a common ancestor

Question 10

do acquired characteristics provide evidence for evolution

Answer 10

no, acquired characteristics are not inherited

Question 11

natural selection acts on

Answer 11

phenotypes

Question 12

gene flow

Answer 12

movement of alleles into or out of a population

Question 13

3 things needed for evolution to take place

Answer 13

genetic drift, gene flow, mutations, nonrandom mating, natural selection

Question 14

genetic drift

Answer 14

random change in allele frequency in a population

Question 15

gene flow

Answer 15

movement of genes into or out of a population due to interbreeding

Question 16

mutations

Answer 16

change in the nucleotide-base sequence of a gene or DNA molecule

Question 17

nonrandom mating

Answer 17

when individuals prefer mates with particular superior physical characteristics

Question 18

natural selection

Answer 18

process by which individuals that are better suited for their environment survive and reproduce more frequently than those that are not

Question 19

since natural resources are limited

Answer 19

all organisms must compete

Question 20

analogous structure

Answer 20

structure that evolves independently but serves the same function

Question 21

what may cause variation in genotype

Answer 21

mutations, genetic recombination, independent assortment, environment

Question 22

what kind of population is most fit

Answer 22

large

Question 23

why has DDT become useless

Answer 23

natural selection acted on those without the DDT resistant gene and DDT resistant have survived and reproduced more frequently

Question 24

natural selection is the…

Answer 24

largest and most influential force driving evolution

Question 25

sexual selection

Answer 25

occurs when a mate chooses a sexual partner based on some trait

Question 26

emigration

Answer 26

organisms move out of an area, causes gene flow

Question 27

immigration

Answer 27

organisms moving into an area, causes gene flow