Unit 3 Words

Question 1

Faculitation

Answer 1

aphids and ants living in the same area

Question 2

Competition

Answer 2

squirrels and chipmunks fighting over acorns

Question 3

Obligatory mutualism

Answer 3

one organism can’t survive w/o the other

ex: Yucca plant + moth

Question 4

Commensalism

Answer 4

between two organisms, one receives a benefit or benefits from the other and the other is not affected by it

Question 5

Predation

Answer 5

the preying of one animal on others

Question 6

Microevolution

Answer 6

Change in gene’s frequency within a population

Question 7

Macroevolution

Answer 7

Formation of new species from ancestrial species

Question 8

Parasitism

Answer 8

the parasite, benefits at the expense of the other, the host

Question 9

Order (least amt of biodiversity to most)

Answer 9

Desert, Tundra, Grassland, Deciduous Forest, Tropical Rainforst

Question 10

Climate

Answer 10

temp and precipitation are its two main factors

Question 11

Primary succession

Answer 11

occurs where no life has existed before

Question 12

Resource

Answer 12

a stock that can be limited

Question 13

Evolution

Answer 13

change in genetic composition of a population over time

Question 14

Coevolution

Answer 14

changes in species’ genetic compositions both affect each other’s evolution

Question 15

R-selected species

Answer 15

place an emphasis on a high growth rate, typically exploit less-crowded ecological niches
ex: insects, rodents

Question 16

K-strategists

Answer 16

mature slowly and are a niche specialists

Question 17

Predator adaption

Answer 17

long, sharp claws

Question 18

Number of mass extinctions

Answer 18

5

Question 19

When food resources decrease, this increases

Answer 19

competition

Question 20

Invasive Species

Answer 20

typically generalists w/ broad niches and are not native to an area

Question 21

Tropical Rainforests

Answer 21

have little plant life at ground level

Question 22

Fragmenting a habitat will lead to a reduction of species

Answer 22

diversity

Question 23

Convergence

Answer 23

when two species in similar biomes have similar traits

Question 24

Darwin’s finches are examples of ________ radiation

Answer 24

adaptive

Question 25

Speciation is usually influenced by _____ change

Answer 25

environmental

Question 26

Natural selection that favors the average is _________ selection

Answer 26

stabilizing

Question 27

Background

Answer 27

natural extinction rate is less than 10 per year