Crop plants

Question 1

Explain how chemical fertilizers can increase crop yield?

Answer 1

-Made up of mineral ions, such as nitrates and magnesium
-Nitrates are used to make protein grow and Magnesium is used to make chlorophyll
-This allows for more photosynthesis and growth, which increases crop yield

Question 2

Describe the process of Eutrophication?

Answer 2

-Algal bloom
-Algae block sunlight, which means no photosynthesis for aquatic plants
-Plants die, so decrease in oxygen
-Bacteria decompose dead organisms, due to decrease in oxygen

Question 3

What is a pesticide?

Answer 3

A chemical that kills pests

Question 4

Explain why unfiltered water containing more bacteria affects the growth of the fish?

Answer 4

-Bacteria uses up oxygen, so there is less for the fish
-This means the fish will have to respire aerobically more and will have more lactic acid build up, causing more oxygen debt
-This uses energy, therefore the rate of growth of the fish decreases

Question 5

Explain why carbon monoxide is a harmful air pollutant?