Question

3. Tick the plants in which the leaves do not carry out photosynthesis. How do such
plants make their food?
a)
b)
d)
c)​

Answer 1

Question 1:

Why do organisms need to take food?

Answer:

All organisms need to take food to get energy for the growth, development, locomotion and maintenance of their bodies.

Question 2: Distinguish between a parasite and a saprotroph.

Answer:

Difference between a parasite and a saprotroph

s.No

Parasite

Saprotroph

1.

Organisms derive nutrition from the body of other living organisms (host) are parasites.

Plants which derive nutrition from dead and decaying organisms are called saprotrophs.

2.

Example: Cuscata

Example: Mushrooms

Question 3: How would you test the presence of starch in leaves?

Answer:

Take a potted plant with variegated leaves – for example, money plant or crotons.

Keep the plant in a dark room for three days so that all the starch gets used up