Disruption to food chains

Question 1

Define interdependence

Answer 1

It is the way in which living organisms depend on eachhother to survive, grow and reproduce.

Question 2

Define Bioaccumulation

Answer 2

It is the build up of toxic chemical inside oragnsisms in a food web/chain

Question 3

Define ecosystem

Answer 3

It is the name of the interaction between plants, animals and their habitat in a particular location

Question 4

Define habitat

Answer 4

A place of living for organisms

Question 5

Define co-exist

Answer 5

It is when plants and animals live in the same habitat in the same time.

Question 6

Define niche

Answer 6

Niche is the particular place or role organisms has in an ecosystem.

Question 7

What do organisms in a food chain depend on to survive

Answer 7

They depend on each other to survive. It is called being interdependent on each other

Question 8

What is the relation between population and interdependence

Answer 8

If the population of one organism changes, it affects the population f ther organisms. Prey: Decrease. Predator : Decrease. Prey increase: predator : increase

Question 9

What does a food chain show?

Answer 9

The food chain shows the transfer of energy between organisms ( what eat whats)

Question 10

2. What do the arrows represent?

Answer 10

• The arrows represnt the transfer of energy between the food source to the animal eating ( consuming ) it.

Question 11

3. Animals in a food chain are dependent on each other to survive – what is this called?

Answer 11

Interdepence

Question 12

4. What do the numbers represent in the pyramid?

Answer 12

The number of organisms

Question 13

5. As you move up the food chain, what is happening to the number of organisms in this pyramid?

Answer 13

Decreasing because energy is lost as you move up each trophic level.

Question 14

What type of store of energy are animals

Answer 14

chemical

Question 15

What does a food web show

Answer 15

Different food chains joined together

Question 16

What harmful susbtances can build up in animals

Answer 16

1- Plastic
2- DDT
3- Mercury

Question 17

How can bioaccuulation impact organisms

Answer 17

It can ipact organisms growth and can eventually lead them to being sick ad die if they intake a large quantity

Question 18

Give an example of bioaccumulation

Answer 18

High levels of DDT (insecticides) in hawks can break their eggs which decreases their population

Question 19

What is happening to the levels of DDT as it moves up the food chain?

Answer 19

It build up (accumulates) therefore it Increases

Question 20

What is happening to the number of organisms as you move up the food chain?

Answer 20

decreasing

Question 21

Why do you think the level of DDT is changing?

Answer 21

The producers will take in DDT from the water.

The primary consumer will then eat a lot of the producers and will therefore have a higher level of DDT than one producer.

The secondary consumer will then eat a lot of the primary consumers and will have even more DDT in it.

Question 22

Put these in order:

The level of insecticide is therefore higher in the crustaceans than in the microorganisms.

Each small crustacean eats many microorganisms.

Insecticides are sprayed onto a field.

Each small fish eats many crustaceans; again the level of insecticide increases.

Microorganisms absorb a tiny amount of insecticide.

Each large fish eats many small fish; the level of insecticide increases further.

Insecticides are washed into rivers by rain.

Top predators, such as otters, are poisoned by the high level of insecticide in their food.

Answer 22

Insecticides are sprayed onto a field.

Insecticides are washed into rivers by rain.

Microorganisms absorb a tiny amount of insecticide.

Each small crustacean eats many microorganisms.

The level of insecticide is therefore higher in the crustaceans than in the microorganisms.

Each small fish eats many crustaceans; again the level of insecticide increases.

Each large fish eats many small fish; the level of insecticide increases further.

Top predators, such as otters, are poisoned by the high level of insecticide in their food.