Human Population — Biology STD 10 — Question

A plant which does not perform photosynthesis

Give Reasons for the Following:
All living things must excrete.

Name the following:
The chemical substance used to test the presence of starch in the cell of a leaf.

Name the following:
The part of chloroplast where the dark reaction of photosynthesis takes place.

A potted plant was taken in order to prove a factor necessary for photosynthesis. The potted plant was kept in the dark for 24 hours. One of the leaves was covered with black paper in the centre. The potted plant was then placed in sunlight for a few hours.

Write a balanced chemical equation to represent the process of photosynthesis.

Name the hormone responsible for the following function:
Responsible for normal growth of the whole body

What is meant by ‘population density’?

Name the following:
The eye defect caused due to shortening of the eye ball from front to back.

Name the Following:
The type of cell division found in unicellular organisms where cytoplasm divides without spindle formation.

What is the advantage of wilting to a plant?