Goitre is caused by the deficiency of
1). Iodine
2). Chlorine
3). Sodium
4). Calcium
1. Study of typical behaviour of organisms in their natural habitat is called
2. The subcellular organelle not bound by a single membrane is
3. Amoeba belongs to the phylum
4. The scientific name of human being is?
5. The discoverer of penicillin was
6. Darwin finches refer to a group of
7. The term ecosystem is first given by-
8. Question 15:Describe the post-fertilization changes in a flower.