11.
Two species occupying same or overlapping area are

12.
The ecosystem of a pond is referred as

13.
Which of the following systems in man is affected by the bite of cobra ?

14.
________ is a thyroid hormone which controls the balance of calcium in the body.

15.
Which of the following is known as master gland in man?

16.
What is the effect of oversecretion of hormone from pituitary gland?

18.
Oxytocin hormone is secreted by gland

19.
Enlargment of _______ gland takes place due to deficiency of iodine

20.
Which one of following is not a endocrine gland?

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