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Sect 2.6-2.8 Symbiosis/Predation/Competition

Total questions: 25

Worksheet time: 15mins

Name
Class
Date
1.

_____ is the amount of energy lost as heat between trophic levels.

a)

10%

b)

25%

c)

75%

d)

90%

2.

If a plant receives 10,000 calories from the sun, how much is left after it is eaten by an herbivore and a carnivore?

a)

1 calorie

b)

10 calories

c)

100 calories

d)

1000 calories

3.

Which of the following are a major type of community interaction? (3)

a)

biological pest control

b)

predation

c)

competition

d)

symbiosis

4.

_____ is an adaptation that helps an organism blend into its environment.

a)

predation

b)

competition

c)

carrying capacity

d)

camouflage

5.

When you look like something you are not to protect yourself from predators it is called _____.

a)

mimicry

b)

grazing predation

c)

true predation

d)

natural selection

6.

_____ increases or displays the ability of an organism to be successful in its environment and niche.

a)

fitness

b)

natural selection

c)

coevolution

d)

symbiosis

7.

_____ are the organisms that are very important to the health and stability of an ecosystem.

a)

predators

b)

prey

c)

coevolved species

d)

keystone species

8.

The different feeding positions in a food chain or food web are called _____.

a)

producers

b)

trophic levels

c)

consumers

d)

predators

9.

_____ is using an introduced predator species to control the population of an introduced invasive species.

a)

coevolution

b)

keystone species

c)

natural selection

d)

biological pest control

10.

When a species changes over a long period of time in response to changes in an organism they have a relationship with, it is called _____.

a)

coevolution

b)

bievolution

c)

concurrent evolution

d)

natural selection

11.

_____ consists of dead leaves and other plant remains that accumulate on the ground.

a)

detritus

b)

biomass

c)

detritivores

d)

producers

12.

What provides producers with the necessary nutrients to make organic compounds again?

a)

the actions of consumers

b)

sunlight

c)

the actions of decomposers

d)

the actions of hervivores

13.

What type of organism will consume a producer? (3)

a)

an herbivore

b)

an omnivore

c)

a consumer

d)

a scavenger

14.

In a graph plotting predator/prey populations over time, when prey numbers increase what happens to predator numbers over time?

a)

they go in opposite directions

b)

they go down

c)

they stay the same

d)

they go up

15.

The predator prey relationship between a deer and the leaves it eats on a bush is called a/an _____. (2)

a)

natural selection

b)

herbivory

c)

grazing predation

d)

true predation

16.

Interspecific competition often leads to _____ due to competition for resources. (4)

a)

extinction

b)

resource partitioning

c)

evolution

d)

natural selection

17.

When the green Anolis and the brown Anolis lizards adapted over time to living on the ground and in trees, ____ was the result and _____ helped to make it happen. (2)

a)

more competition for resources

b)

less competition for resources

c)

extinction

d)

specialization

18.

_____ is necessary for natural selection to occur within a species.

a)

interspecific competition

b)

intraspecific competition

c)

competitive exclusion

d)

specialization

19.

Competition within a species is often for _____. (4)

a)

water

b)

sunlight

c)

weather

d)

food

e)

resources

20.

_____ is at work when two or more species compete for the same resources but one is more fit or better adapted for life in that ecosystem.

a)

intraspecific competition

b)

interspecific competition

c)

competitive exclusion principle

d)

a lack of natural selection

21.

The symbiotic relationship involved in lichens is _____.

a)

commensalism

b)

parasitism

c)

mutualism

d)

competitive exclusion

22.

Symbiotic relationships can be ______. (3)

a)

random

b)

neutral

c)

negative

d)

positive

23.

The first trophic level is always occupied by _____.

a)

omnivores

b)

herbivores

c)

producers

d)

decomposers

24.

_____ is the total amount of living material in a given area.

a)

biomass

b)

detritus

c)

producers

d)

consumers

25.

Which of the following are a type of ecological pyramid? (3)

a)

numbers

b)

feeding relationships

c)

biomass

d)

energy