Differentiate between the following pairs on the basis of what is mentioned within brackets:

Rods and Cones of Retina (Type of pigment).

The diagram given below shows a section of a human kidney. Study the diagram carefully and answer the questions that follow:

(i) Label the parts numbered 1 to 4.

(ii) Why does part '2' have a striped appearance?

(iii) What is the fluid that passes down part '4'? Name the main nitrogenous waste present in it.

(iv) Mention the structural and functional units of kidneys.

(v) Name the two major steps in the formation of the fluid mentioned in Q. 5(a) (iii).

Differentiate between the following pairs on the basis of what is mentioned within brackets:

Tubectomy and Vasectomy (Part cut and tied)

Differentiate between the following pairs on the basis of what is mentioned within brackets:

RBC and WBC (Shape)