microevolution and natural selection 9/9-9/13

studied byStudied by 1 person
0.0(0)
Get a hint
Hint

evolution

1 / 18

flashcard set

Earn XP

19 Terms

1

evolution

a change over time

New cards
2

units of evolution

population and species

New cards
3

population

a group of members of the same species living in the same place at the same time

New cards
4

species

a group of members that can breed and produce fertile offspring

New cards
5

charles darwin

created the theory of natural selection

New cards
6

natural selection

the mechanism that allows populations to become better adapted to the environment over generations

New cards
7

selection pressures

a change in environment that causes a need to adapt

New cards
8

components of natural selection

  • populations are capable of producing large numbers of offspring

  • variation exists within the offspring

  • individuals struggle for existance

  • differential inharitance of genes

New cards
9

ecosystem dynamics

the study of the relationships between organisms and their environment

New cards
10

selection pressure types

  • biotic (living) factors

  • abiotic (non-living) factors

New cards
11

biotic factor examples

  • food webs

  • food chains

New cards
12

abiotic factor examples

  • pH levels

  • weather

  • climate

  • geology

New cards
13

identified broad observations of adaptation

  • unity of life

  • diversity of life

  • match between organisms and their environments

New cards
14

darwinian fitness

the contribution an individual makes to the gene pool of the next generation, relative to the contributions of other individuals

New cards
15

mode of selection

  • stabilizing selection

  • directional selection

  • disruptive selection

New cards
16

stabilizing selection

the average individual is favored

New cards
17

directional selection

one extreme is favored

New cards
18

disruptive selection

both extremes are favored

New cards
19

artificial selection

when human beings modify other species by selecting and breeding them for desired traits

New cards

Explore top notes

note Note
studied byStudied by 31 people
... ago
5.0(1)
note Note
studied byStudied by 4 people
... ago
5.0(1)
note Note
studied byStudied by 1 person
... ago
5.0(1)
note Note
studied byStudied by 37 people
... ago
5.0(1)
note Note
studied byStudied by 10 people
... ago
5.0(1)
note Note
studied byStudied by 3 people
... ago
5.0(1)
note Note
studied byStudied by 26 people
... ago
5.0(3)

Explore top flashcards

flashcards Flashcard (115)
studied byStudied by 9 people
... ago
4.0(1)
flashcards Flashcard (78)
studied byStudied by 15 people
... ago
5.0(1)
flashcards Flashcard (26)
studied byStudied by 4 people
... ago
5.0(1)
flashcards Flashcard (102)
studied byStudied by 200 people
... ago
5.0(1)
flashcards Flashcard (37)
studied byStudied by 11 people
... ago
5.0(2)
flashcards Flashcard (84)
studied byStudied by 4 people
... ago
5.0(1)
flashcards Flashcard (36)
studied byStudied by 8 people
... ago
5.0(1)
flashcards Flashcard (32)
studied byStudied by 291 people
... ago
4.2(6)
robot