There are _____hypothesis which may explain opening and closing of stomata?

1. 1. One
   2. Three
   3. Four
   4. Two

Golden brown colour of diatoms is due to presence of_____.

1. 1. Fucoxanthin, diatoxanthin, diadinoxanthin
   2. Mycoxanthin, mucoxanthin and myxoxanthophylls
   3. Alpha and beta carotenes and myxoxanthin
   4. None of them

The number of carpals in our feet is_____.

1. 1. 7
   2. 0
   3. 14
   4. 16

Breeders have developed new and better varieties of food items by using which technique?

1. 1. Genetic engineering
   2. Pasteurization
   3. Hydroponic culture technique
   4. Biological control techniques

Which Vitamin is needed for the formation of a light-sensitive pigment in the retina?

1. 1. Vitamin C
   2. Vitamin D
   3. Vitamin A
   4. B complex

Smallest bone of human body is_____.

1. 1. vomer
   2. navicular
   3. stapes
   4. occipital

Which of the following statements about fractures in old age is incorrect?

1. 1. Due to good blood supply it results in quick healing
   2. They are more common than in adult age
   3. Occur as a result of bone being thin and weak
   4. It involves osteoblasts and osteocytes

True metamorphosis is not present in_____.

1. 1. Crustacea
   2. Insecta
   3. Myriapoda
   4. Arachnida

Which of the following statement about Kingdom Protista is incorrect_____.

1. 1. They only include unicellular aquatic eukaryotic organisms
   2. Their members have characteristics which separate them from other kingdoms
   3. They do not develop from Blastula or embryo
   4. They contain ancestors for fungi plants & animals

Which of the following openings have cilia?

1. 1. Nephridiopore
   2. Nephrostome
   3. Both a & b
   4. None of these