A gene showing co-dominance has?

1.	One allele is dominant on the other
2.	Alleles are tightly linked on the same chromosome
3.	Alleles that are recessive to each other
4.	Both alleles are independently expressed in the heterozygote

Which of the following structure is not found in a prokaryotic cell?

1. Nuclear envelope

2. Ribosome

3. Mesosome

4. Plasma membrane

The term "linkage" was coined by?

1. T.H. Morgan

2. T.Boveri

3. G.Mendel

4. W.Sutton

The imperfect fungi which are decomposers of litter and help in mineral cycling belong to?

1. Deuteromycetes

2. Basidiomycetes

3. Phycomycetes

4. Ascomycetes

Match the columns and identify the correct option. 

1. A → (iv), B → (iii), C → (i), D → (ii)

2. A → (iii), B → (iv), C → (i), D → (ii)

3. A → (iii), B → (i), C → (iv), D → (ii)

4. A → (iii), B → (iv), C → (ii), D → (i)

Select the wrong statement:

During biological nitrogen fixation, inactivation of nitrogenase by oxygen poisoning is prevented by?

1. Leghaemoglobin

2. Xanthophylls

3. Carotene

4. Cytochrome

The species confined to a particular region and not found elsewhere are termed as:

Which one of the following hormones is not involved in sugar metabolism?

1. Cortisol

2. Aldosterone

3. Insulin

4. Glucagon

Which of the following is not a function of the skeletal system?

1. Production of erythrocytes

2. Storage of minerals

3. Production of body heat

4. Locomotion