Ramesh is a farmer who has a vineyard and cultivates grapes. To improve the shape of the grapes and
make them elongated he sprays a particular phytohormone at the time of fruiting.
(a) Name the phytohormone that Ramesh sprays on the plant at the time of fruiting.
(b) These grapes are said to be seedless. What is the technical term for the formation of such fruits?

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.