a. Complete the table below. Organism Mode of feeding Feature of mouthpart that adapts organism to mode of feeding [6 marks] b. List five parts of the alime...

a. Complete the table below.

    [6 marks]

b. List five parts of the alimentary canal of an earthworm.    [5 marks]

c. State six ways by which water could be polluted by agricultural practices.    [6 marks]

d. Describe briefly the life cycle of a housefly.    [5 marks]

e. Make a diagram, 6 cm – 8 cm long of the hypogeal germination in a mature maize seedling and label fully.    [8 marks]
 

Answer Details

a.

b. The five parts of the alimentary canal of an earthworm are:

1. Mouth
2. Pharynx
3. Esophagus
4. Crop
5. Gizzard
6. Intestine
7. Anus

c. Six ways by which water could be polluted by agricultural practices are:

1. Excessive use of fertilizers and pesticides, which can leach into groundwater or runoff into nearby water sources.
2. Manure and waste runoff from animal farms, which can contain harmful pathogens and nutrients that can cause eutrophication.
3. Soil erosion from farming activities, which can deposit sediment and other contaminants into waterways.
4. Irrigation practices that use water inefficiently, leading to increased water usage and depletion of water sources.
5. Deforestation and land conversion for agriculture, which can impact the natural water cycle and lead to reduced water quality and quantity.
6. Contamination of water sources from machinery or storage facilities used in agricultural activities.

d. The life cycle of a housefly includes the following stages:

1. Egg: The female housefly lays eggs on decaying organic matter or animal waste.
2. Larva: The eggs hatch into larvae, also known as maggots, which feed on the decaying matter and grow rapidly.
3. Pupa: After several days, the mature larvae form a pupa, which is a protective coc