Question

Match the animals listed in column I with their of nature of blood listed in column II. Choose the answer which gives the correct combination of alphabets of the two columns.

	Column I		Column II
A.	Man	1.	Plasma and cells are colourless
B.	Earthworm	2.	Plasma is colourless and nucleated RBCs
C.	Cockroach	3.	Plasma is colourless and enculeated RBCs
D.	Frog	4.	Plasma is red and nucleated, colourless RBCs
		5.	Plasma and RBCs have haemoglobin

• A. A - 1, B - 4, C - 2, D - 3
• B. A - 5, B - 3, C - 1, D - 4
• C. A - 3, B - 4, C - 1, D - 2
• D. A - 4, B - 5, C - 3, D - 2

Answer 1

The correct option is C A - 3, B - 4, C - 1, D - 2

In man, about 55% of blood is blood plasma, a fluid that is the blood's liquid medium, which by itself is straw-yellow in colour. The red blood cells are biconcave circular and enucleated.
Only mammals have enucleated red blood cells. In earthworm, blood is reddish in colour. It is formed of plasma and corpuscles. The corpuscles are amoeboid, colourless and nucleated. The plasma contains a red pigment called as haemoglobin.
Cockroaches have white blood because cockroaches lack haemoglobin in their blood. Haemoglobin is primarily made up of iron and is what gives human blood its red colour. Cockroaches have an open circulatory system, with body cavities full of haemolymph.
Frog blood is similar to human blood in its basic structure. Like human blood, frog blood is mainly made of the liquid plasma matrix and red blood cells. Unlike the red blood cells of humans, the red blood cells of frogs have nuclei when mature and divide. The white blood cells of frog are similar to ours in both form and function. Frogs have no platelets.

So, the correct answer is 'A - 3, B - 4, C - 1, D - 2'