Hemoglobin is dissolved in the blood of_____.

1. 1. Hydra
   2. Cockroach
   3. Earthworm
   4. Sponges

When abdomen expands, the number of spiracles open is_____.

1. 1. 6
   2. 8
   3. 10
   4. 12

Joints between flat bones of skull are termed as_____.

1. 1. Sutural joints
   2. Suture
   3. Both A and B
   4. Syndesmosis

Insulin and glucagons are _____in nature.

1. 1. Amino acid derivative
   2. Protein
   3. Steroid
   4. Polypeptide

Study of interaction of living organisms with other organisms and their environment relates with _____.

1. 1. Social biology
   2. Botany
   3. Pharmacology
   4. Ecology

Main use of salt in diet is to_____.

1. 1. produce small amount of hydrochloric acid required for digestion
   2. Ease the process of cooking
   3. Increase the taste
   4. All of the above

The part of chloroplast where CO2 is fixed to manufacture sugar is_____.

1. 1. Stroma
   2. Grana
   3. Outer membrane
   4. Thylakoid

The energy currency of the cell is called _____.

1. 1. RNA
   2. DNA
   3. ATP
   4. ADP

The bond formed when two or more atoms complete their electron shells by sharing electrons is called_____.

1. 1. Ionic bond
   2. Covalent bond
   3. Electrovalent bond
   4. Hydrogen bond

Complete breakdown of glucose molecule takes place in which of the following?

1. 1. Aerobic respiration
   2. Alcoholic fermentation
   3. Lactic acid fermentation
   4. None of these