Life Science Unit I Test

Review

1. Describe how living things interact on several levels of organization: organism, population, community, ecosystem, and biosphere.

2. Describe the role of organisms as producers, consumers, herbivores, carnivores, or decomposers in an ecosystem. Give examples of each.

3. Describe how predators and prey control each other’s population.4. Define symbiosis and describe three types of symbiotic

relationships: mutualism, commensalism, and parasitism. Give examples. 

5. Describe how biotic and abiotic factors can influence an ecosystem.

6. Describe a simple food chain or food web using the words producer, consumer (primary, secondary and tertiary) and trophic level.

For this unit, you should be able to:

7. Describe how energy flows through ecosystems with reference to the pyramid of energy, pyramid of numbers and pyramid of biomass.

8. Describe several abiotic factors that influence the distribution of living things.

9. List and describe characteristics of each of the eight different biomes you studied. Provide characteristic plants and animals.

10. Describe how organisms become adapted to the environment using vocabulary such as mutation, adaptation and natural selection.

11. Provide examples of different adaptations that predator and prey species may have to help them survive.

For this unit, you should be able to:

12. Describe the role of biodiversity in stabilizing an ecosystem.

13. Define keystone species and give an example.14. Define how competition can occur between species

and within species in a community and what may result.

15. Describe how resource partitioning can lead to adaptive radiation.

16. Provide examples of foreign species and possible impacts of their introduction into an ecosystem.

17. Distinguish between primary and secondary succession , and describe the role of pioneer species in succession

For this unit, you should be able to:

Practice Questions

In a food web, how much energy is transferred to the next trophic level?

10%Energy is lost to life processes such as

reproduction, as well as heat

A.

B.

C.

D.

E.

Which of the following organisms is a decomposer?

None of the Above

Lichen

Dung Beetle

Vulture

Fungus

A.

B.

C.

D.

E.

An ecologist wants to gather information about a stream along a mountainside. Which of the following is a biotic factor?

None of the above

water flow rate

mineral deposits

water temperature

variety of life forms

A.

B.

C.

D.

E.

What relationship exists between the bee and the flower?

predation

consumerism

parasitism

commensalism

mutualism

A.

B.

C.

D.

E.

Which of the five biomes would have the greatest rate of photosynthesis?

Polar Ice

Desert

Temperate Rainforest

Boreal Forest

Tropical Rainforest

A.

B.

C.

D.

E.

Which of the following characteristics would describe the biome shown in the picture below?

permafrost

a lot of precipitation

long, hot winters

many deciduous trees

small amounts of rainfall

A.

B.

C.

D.

E.

Consider the following climatograph which shows monthly precipitation and temperatures for the town of Tofino. What is the average temperature of Tofino during the month of May?

None of the above

25°C

15°C

−18°C

10°C

A.

B.

C.

D.

E.

Which of the following type of relationships does the organism pictured below participate in?

None of the above

Predation

Mutualism

Commensalism

Parasitism

A.

B.

C.

D.

E.

The picture below illustrates what type of relationship?

None of the above

Mutualism

Predation

Parasitism

Commensalism

A.

B.

C.

D.

E.

Organisms that feed on fecal matter and other organic waste would best be described as

decomposers

producers

herbivores

carnivores

detrivores

A.

B.

C.

D.

E.

Which of the following species is most likely to occupy the second trophic level in an ecosystem?

None of above

insect-eating bird

bird-eating cat

apple

apple-eating insect

A.

B.

C.

D.

E.

Which of the following characteristics distinguishes decomposers from other consumers?

None of the above

The tendency to gain nutrition from dead organisms

The ability to produce food

Their position within a grazing food chain

The ability to chemically break down organic compounds

A.

B.

C.

D.

E.

Which of the following describes detrivores?

None of the above

organisms that photosynthesize

organisms that feed on producers

organisms that are parasites

organisms that feed on plant and animal remains

A.

B.

C.

D.

E.

In which of the following biomes would the removal of a species have the greatest impact?

temperate rainforest

grassland

tropical rainforest

boreal forest

tundra

A.

B.

C.

D.

E.

In which of the following situations would primary succession occur?

None of the above

after a flood

after the logging of a climax forest

after a forest fire

on bare rock

A.

B.

C.

D.

E.

Which of the following is most likely to lead to a decrease in species diversity?

None of the above

species proliferation

adaptive radiation

biodegradation

extinction

A.

B.

C.

D.

E.

Which of the following would not be considered a primary consumer?

dik dik

cow

deer

rabbit

orca

A.

B.

C.

D.

E.

What level of organization would a flock of geese be classified as?

biosphere

ecosystem

organism

community

population

A.

B.

C.

D.

E.

A symbiotic relationship in which both partners benefit is called

None of the above

consumerism

commensalism

parasitism

mutualism

A.

B.

C.

D.

E.

Which of the following is considered a biotic factor?

temperature

wind

sunlight

water

parasites

A.

B.

C.

D.

E.

In the food web below, which of the following organisms is an omnivore?

deer

marmot

red-tailed hawk

chipmunk

grizzly bear

A.

B.

C.

D.

E.

Which of the following is more likely to be a predator adaptation?

None of the above

being poisonous

mimicry

displaying warning colouration

being able to travel at high speed

In the picture below, one of the frog species is harmless, while the other two are highly toxic. What is this an example of?

Mimicry

A.

B.

C.

D.

E.

This picture illustrates what process?

None of the above

Extinction

Extirpation

Proliferation

Adaptive radiation

The process that favours the survival of organisms with traits that make better adapted to the environment is known as ___________________.

Natural Selection

What advantage do food webs have over food chains?Food webs show many feeding

relationships.

A.

B.

C.

D.

E.

Which of the following is a characteristic of the tundra biome?

None of the above

annual rainfall in excess of 120 cm per year

high plant growth

deciduous forests

permafrost layer

A.

B.

C.

D.

E.

What biome does not support herbivores?

None of the above

Tropical rainforest

Tundra

Desert

Polar ice