Biology Chapter 4 Guided Reading/study Wkbk 4-2

Front 1

3. What is a niche?

Back 1

the full range of physical and biological conditions in which an organism lives and the way in which the organism uses those conditions.

Front 2

4. In what ways is food part of an organism's niche?

Back 2

a niche includes the type of food the organism eats, how it obtains this food and which other species use the organism as food

Front 3

5.a. true or false
No two species can share the same niche in the same habitat

Back 3

true

Front 4

5.b. T or F
Different species can share the same niche in the same habitat

Back 4

F

Front 5

5.c. T or F
Two species in the same habitat have to share a niche to survive

Back 5

F

Front 6

5.d. T or F
Different species can occupy niches that are very similar

Back 6

T

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6. When does competion occur

Back 7

Competition occurs when 2 species compete for food if they occupy the same niche.

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7. What is a resource?

Back 8

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

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8. What is often the result of direct competition in nature?

Back 9

Direct competition in nature often results in a winner and a loser w/ the losing organism failing to survive.

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9. What is the competitive exclusion principle?

Back 10

States that no 2 species can occupy the same niche in the same habitat at the same time.

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10. What is predation?

Back 11

an interaction in which one organism captures and feeds on another organism.

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11. When predation occurs, what is the organism called that does the killing and eating, and what is the food organism called.

Back 12

When predation occurs, the organism that does the kiting and eating is called the predator and the food organism is called the prey.

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13.a. Decsribe Mutualism

Back 13

both species benefit from the relationship.

Front 14

13.b. Describe Commensalism

Back 14

1 member of association benefits and other neither helped nor harmed.

Front 15

13.c. Describe parasitism

Back 15

1 organism lives on/inside another organism and harms it.

Front 16

14. The organism from which a parasite obtains nutritional needs is called a (an) BLANK

Back 16

Host

Front 17

15.a. T or F
Parasite generally weaken but do not kill their host.

Back 17

T

Front 18

15.b. T or F
Parasites obtain all or part of their nutritional needs from the host.

Back 18

T

Front 19

15.c. T or F
Parasites neither help nor harm the host.

Back 19

F

Front 20

15.d. T or F
Parasites are usually smaller than the host.

Back 20

T

Front 21

16. What is ecological succession?

Back 21

gradual changes in living communities that follows a disturbance.

Front 22

18. The first species to populate an area when primary succession begins are called?

Back 22

pioneer species.

Front 23

1.b. Define Abiotic factors

Back 23

physical, or nonliving factors that shape an ecosystem
ex. climate, wind, nutrient availability, sunlight

Front 24

1.a. Define Biotic factors

Back 24

biological influence in organisms within an ecosystem.
Ex. ecological community

Front 25

2. What do the biotic and abiotic factors together determine?

Back 25

Together biotic and abiotic factors determine the survival and growth of an organism and the productivity of the ecosystem in which the organisms live.

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12. What is symbiosis?

Back 26

any relationship in which 2 species live closely together.

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17. What is primary succession?

Back 27

on land, succession that occurs on surfaces where no soil exists.