a. (i) Complete the table below with the respiratory surface of each of the listed organisms. organism respiratory surface Tadpole (2days old) Cockroach Dom...

a.    (i)  Complete the table below with the respiratory surface of each of the listed organisms.
       

       (ii)  State five characteristic features of respiratory surfaces in organisms.    [5 marks]

b. Make a drawing, 4 cm ? 6 cm long of the respiratory organ in Tilapia and label fully.    [9 marks]
 

Answer Details

a.

(i) Here is the completed table with the respiratory surface of each organism:

(ii) Five characteristic features of respiratory surfaces in organisms are:

1. They are thin: This allows for efficient diffusion of gases across the surface.
2. They are moist: Moist surfaces help dissolve gases, which makes it easier for them to diffuse across the surface.
3. They have a large surface area: A larger surface area means more gases can be exchanged at a faster rate.
4. They are in contact with the environment: This allows for the exchange of gases between the organism and the environment.
5. They are adapted to the organism's environment: Respiratory surfaces are adapted to the organism's habitat and way of life.

b.

Tilapia is a freshwater fish that has a respiratory organ called the gills. Here is a drawing of the gills in Tilapia, labeled fully:

The gills are located on both sides of the fish's head and are covered by a bony plate called the operculum. Water flows over the gills, and oxygen is absorbed into the bloodstream while carbon dioxide is released into the water. The gills have many tiny filaments that increase the surface area for gas exchange, and they are highly vascularized to maximize the uptake of oxygen.