Name the mineral elements required for:
(a) Clotting of blood
(b) Synthesis of thyroxine
(a) Name the process for the release of the part (ii) Mention two harmful effects of noise pollution.
labelled 1. (iv) Why are RBCs efficient in their functions though
(b) Write the name of the structure marked 2. they lack nucleus and mitochondria?

15] Select the correct answers to the questions from the given options. (Do not copy the questions, write the correct answer only).
The structure that lies at the junction of the choroid and the iris and is itself a part of the choroid is called:

15] Select the correct answers to the questions from the given options. (Do not copy the questions, write the correct answer only).
The optimum temperature for photosynthesis is:

Given below is a picture of a tree. Mention the scientific phenomena occurring in the parts labelled (a),
(b) and (c).
(c)
(b)
(a)

15] Select the correct answers to the questions from the given options. (Do not copy the questions, write the correct answer only).
The number of live births per thousand people per year is called:

What are biomedical wastes? Give an example.

State any two harmful effects of acid rain.