Curriculum
Course: Alhussan Biology — Stage 8
Login

Curriculum

Alhussan Biology — Stage 8

Chapter 5: Respiration and the Respiratory System

0/32

Chapter 6: Nutrition, Health and Movement

0/32

Chapter 7: The Health of the Environment

0/21

Chapter 8: Weather and Climate

0/12
Quiz

7.4 Pesticides and bioaccumulation — Quiz

Submit quiz
Once you submit, you will no longer be able to change your answers. Are you sure you want to submit the quiz?
Cancel Submit
  • Questions count: 21
  • Passing grade: B+
Start Quiz
1.
Why do persistent pesticides like DDT build up in animals?
They dissolve in fat and are not easily excreted
They break down quickly
They dissolve in water and are excreted
They are made by the animal
2.
Why can pesticides harm crop yields indirectly?
They can kill bees that are needed for pollination
They kill only pests
They feed the crops
They make soil more fertile
3.
A sparrowhawk died after eating many seed-eating birds from sprayed fields. Why?
The seeds were poisonous to hawks only
Sparrowhawks are herbivores
Hawks eat pesticide directly
It took in the pesticide stored in all the birds it ate
4.
True or false? Top predators receive the highest doses of a persistent pesticide.
True
False
5.
True or false? All pesticides stay in the environment for many years.
True
False
6.
True or false? The lowest concentration of toxin is in the water.
True
False
7.
About ____% of the food grown is lost to pests.
90
60
3
30
8.
About ____% of food grown is lost to pests.
30
60
90
3
9.
Pesticides can increase crop ____.
pests
disease
weeds
yield
10.
Which term matches this definition? “The build-up of a persistent toxin, becoming more concentrated at each level of a food chain.”
Decomposition
Pollination
Biodegradation
Bioaccumulation
11.
Which term matches this definition? “A chemical that kills pests.”
Pesticide
Percentage cover
DDT
Top predator
12.
Which is the correct definition of “Pesticide”?
A species that naturally lives in an area.
Keeping imports apart to check for pests.
A chemical that kills pests.
A sample that does not represent the whole area.
13.
DDT concentration along a river food chain. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 1
A
B
C
D
14.
Crop yield with different pesticide doses. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 2
A
B
C
D
15.
Crop yield with different pesticide doses. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 3
A
B
C
D
16.
The diagram shows DDT concentration in a river food chain. What can you conclude?
Dr Dabour Hub Academy - figure 4
DDT becomes more concentrated at each level, highest in the heron
Plankton have the most DDT
DDT stays the same along the chain
DDT is highest in the water
17.
DDT concentration along a river food chain. Which has the greatest value?
Dr Dabour Hub Academy - figure 5
Plankton
Large fish
Small fish
Heron
18.
DDT concentration along a river food chain. Which has the smallest value?
Dr Dabour Hub Academy - figure 6
Heron
Small fish
Plankton
Large fish
19.
Plankton contain 0.04 ppm DDT and a heron contains 25 ppm. How many times more concentrated is DDT in the heron?
625 times
6250 times
62 times
25 times
20.
Plankton have 0.05 ppm DDT and herons 30 ppm. How many times more concentrated in herons?
2 times
30 times
6000 times
600 times
21.
Plankton have 0.04 ppm DDT and herons 30 ppm. How many times more concentrated in herons?
75 times
750 times
7500 times
30 times
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
Part of Chapter 7: The Health of the Environment — see every lesson and quiz in this unit.
Accepted payment methods