Year 7 Biology test 1

1.

1 point

Endangered species are close to extinction and very small numbers remain.

True

False

2.

1 point

Sustainable ecosystems are ecosystems able to provide for the needs of the organisms living there for a short period of time.

True

False

3.

1 point

Identify the biotic factor in an organism’s environment that can affect its survival.

Events such as fire and flood

The amount of water available

Competitors for living space

The quality of the air

4.

1 point

Identify the term that is defined by the following: ‘an interaction between two organisms in which one of them benefits but the other one is not affected’.

Mutualism

Parasitism

Competition

Commensalism

5.

1 point

What is the relationship between the organisms in Picture 1 ( on the smart board)

Commensalism

Predator/prey

Mutualism

Parasite/host

6.

1 point

Define adaptations.

Non-living factors that influence where an organism lives

Features of an organism that help it survive in its environment

Organisms that inhabit a specific region

Living factors that influence where an organism lives

7.

1 point

Have a look at the three graphs on the paper provided.
Identify the link between sheep numbers, kangaroo numbers and rainfall.

Rainfall does not affect sheep or kangaroo numbers.

Kangaroo numbers are higher in years of good rainfall.

Sheep numbers are high when rainfall is good.

The number of sheep and the number of kangaroos follow the same pattern.

8.

1 point

what is the ultimate source of energy for all the organisms in a food web.

Soil for providing essential minerals

Green plants for photosynthesis

The Sun for providing light

Water to prevent dehydration

9.

1 point

Identify the term that is defined by the following: ‘an interaction between organisms in which both the organisms benefit from the relationship and neither is harmed’.

Parasitism

Mutualism

Commensalism

Competition

10.

1 point

Define an organism’s habitat.

The place where the organism lives

The place where all the abiotic factors are suited to the organism’s survival

The place where the organism is at a point in time

A place where the organism hunts for food

11.

1 point

The wind is a part of an organism’s environment.

True

False

12.

1 point

which of these human activities has a positive effect on food webs.

Overfishing particular fish species causing a decline in numbers

Opening up an area of bushland for recreational activities

Removing introduced predators from an area

Introducing exotic species, such as rabbits and foxes

13.

1 point

Deduce which of these human activities would have a negative impact on a natural environment.

Clearing forests and replacing them with exotic trees

Reintroducing koalas into eucalypt forests

Replanting eucalypt trees

Removing grazing cattle from a natural woodland

14.

1 point

The forest that includes a tree in which a spider lives is regarded as the spider’s habitat.

True

False

15.

1 point

sun --> plant --> cricket --> mice --> eagle

In the food chain above, name the trophic level of the mice

secondary consumer

primary consumer

producer

tertiary consumer

16.

1 point

Describe a decomposer organism

An animal that eats another animal

An animal that uses sound as its main method of communication

A plant that loses its leaves in winter

An organism that breaks down organic matter so it is recycled

17.

1 point

The place where an animal or plant lives at a particular time. ______________________________________

18.

1 point

what is the relationship between the organisms in picture 2 ( on the smartboard)

Parasite/host

Predator/prey

Commensalism

Mutualism

19.

1 point

Grass --> grasshopper --> frog -> snake --> kookaburra

From the food chain above, which organism is a producer?

kookaburra, because it does not have any predators

grasshopper because it feeds the frog

frog, because it produces food for the snake

grass, because it can make it's own food

20.

1 point

Parasitism is an interaction in which one type of organism lives on or in another type of organism and usually causes it harm

True

False