Birth rate is the number of live births per thousand 48 hours to (b) ______ the leaves. A part of a leaf is
persons in:
inserted into a conical flask containing potassium
(a) 1 year (b) 2 years hydroxide solution. This is to absorb (c) _____ from
(c) 10 years (d) 20 years the flask. The plant is then placed in sunlight for a

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.