Bio test #2

Question 1

ecosystems are influecne by a combination of _____ and _____ factors

Answer 1

biological, physical

Question 2

biotic factors

Answer 2

biological influences within an ecosystem

Question 3

abiotic factors

Answer 3

physical or nonliving factors that shape ecosytems, weather, temp, rain

Question 4

______ and _____ factors determine the ____ and _____ of an organism and the _____ of the ecosystem in which the organism lives

Answer 4

biotic, abiotic, survival, growth, productivity

Question 5

habitah

Answer 5

area where an organism lives

Question 6

niche

Answer 6

the way in which an organism uses those condition (where and what you do in the food chain)

Question 7

the range of _____ that an organism needs to survive and its place in the ____ web are part of its niche

Answer 7

temperture, food

Question 8

No ____ species can share the same ____ in the same _____

Answer 8

two,niche, habitah

Question 9

community ___ such as competitions, predation, and more forms of _____ can affect and ecosystem

Answer 9

interactions, symbiosis

Question 10

____ occus when organisms of the same or diff species attemp to use an ecological ___ in the same ___ at the same ___

Answer 10

competition, resource, place, time

Question 11

resource

Answer 11

any necessity of life, water, nutrients, light, food or space

Question 12

competition exclusive principle

Answer 12

no 2 species can occupy the same niche in the same habitah at the same time

Question 13

predation

Answer 13

organism captures and feeds on another organisms

Question 14

symbiosis

Answer 14

any relationship in which 2 species live closely together

Question 15

mutualism

Answer 15

both species benefits

Question 16

commensalism

Answer 16

benefits one species and the other is not harmed

Question 17

parasitism

Answer 17

organism living inside another organism harming it

Question 18

ecosystems are constantly __ in response to ___ and __ interactions

Answer 18

changing, naturals. human

Question 19

ecologic succesion

Answer 19

series of predictable changes that occurs in a community overtime

Question 20

an ecosystem changes in response to an ___ disturbance, othertimes change occus as a more ____ response to natural fluctuations

Answer 20

abrupt, gradual

Question 21

primay succession

Answer 21

occurs in surfaces where there’s no soil

Question 22

pioneer species

Answer 22

first speciels to populate an area

Question 23

secondary successsion

Answer 23

starts with soil after fire and floods

Question 24

healthy ecosystem usually ___ from natural disturbances but may not recover from ___ term, ___ cuased distrubances

Answer 24

recover, long, human

Question 25

in 1987 scientist documented an unsual ____ of organisms living on the remains of a dead ___

Answer 25

community, whale

Question 26

geo distribution

Answer 26

range, describes the area inhibat by a population

Question 27

population den

Answer 27

of individuals per unit area

Question 28

growth rate

Answer 28

increses/decreases of the number of individuals in a populatio over time

Question 29

3 factors that affect populatin size1.

Answer 29

number of births

Question 30

3 factors that affect populatin size2

Answer 30

number of deaths

Question 31

3 factors that affect populatin size3

Answer 31

number of indivuduals that enter or exit the populatin

Question 32

immigration

Answer 32

movement of indivudlas INTO an area

Question 33

migration

Answer 33

movement of individuals out of an area

Question 34

under ideal conditionswith___ resources and in the absense of predation and disease, a populaion will grow ___

Answer 34

unlimited, exponentially

Question 35

exponential gorwh

Answer 35

iccusr when the indivudlas in a population reproduce at a constant rate

Question 36

J-shape curve

Answer 36

J exponentional growht

Question 37

logistic growth

Answer 37

occurs when a population growth slows, stops following a period of exponential growth

Question 38

as resources become less avalibale, the growth of a population ___ or ___

Answer 38

slows, stop

Question 39

S shaped cuve

Answer 39

graph that looks like an S

Question 40

when a population reaches the ____ _____ of its environmnt, its growth ___ off. the average growth rate is ____

Answer 40

carring, capacity, levels. zero

Question 41

carrying capacity

Answer 41

is the largest # of individuals of a population that a given environment can support