Page 2 - Home Assignment I

8 Nisha labelled parenchyma tissue as shown
below. Which of these markings is wrong?
(a) Nucleus
(b) Vacuole
(c) Thick cell wall
(d) Intercellular space

9 The tissue shown in the given figure is
(a) Collenchyma, in which wall thickenings are
present at the angles
(b) Sclerenchyma, in which uniform wall
thickenings are present
(c) Xylem fibres with narrow central lumen
(d) Phloem parenchyma with abundant food
reserve.
10 Read the given statements and select the correct ones.
1. There is no demarcation of dividing and non-dividing regions in animals.
2. Animals consume less energy as compared to plants.
3. Most of the tissues that plants contain are living.
4. Structural organization of organs and organ systems are more specialized
animals than even in very complex plants.
5. Growth of animals is indefinite.
(a) 2, 3 and 5
(b) 2, 3 and 4
(c) 1 and 4
(d) 1 and 5

Subjective

1. What is epidermis? What is its role? 1 E
2. Name two simple permanent tissues which have living cells. 1 E
3. Why epidermis of plants living in dry habitats is thicker? 1 Av
4. Draw and describe the structure and function of stomata 3 Av
5. Give reasons: 3 D
(a) Intercellular spaces are absent in sclerenchyma tissues.
(b) We get a crunchy and granular feeling when we chew pear fruit.
(c) Branches of a tree move and bend freely in high wind velocity.
6. List the characteristics of cork. How are they formed? 3 D