Textbook Solution: Getting to Know Plants | Living Science (Ratna Sagar) for Class 6 PDF Download

Oral Questions For Formative Assessment (P-80)

Q1:
Ans: 2 systems, root system and shoot system

Q2:
Ans: The fibrous root system; maize, wheat

Q3:
Ans: Water and mineral salts

Q4:
(a) rose
(b) carrot
(c) banyan

Q5:
Ans: They provide extra support to the branches or the stem

Oral Questions For Formative Assessment (P-84)

Q1:
Ans: Water and minerals: from roots to the leaves, flowers, and fruits; food: from leaves to all other parts of the plant

Q2:
Ans: Potato: stem stores food; Cactus: prepares food and stores water

Q3:
Ans: Because the glucose prepared by leaves changes into starch before the plant stores it.

Q4:
Ans: Parallel venation

Q5:
Ans: Give support to the plant, for example, leaf tendrils in pea plant; modified to form spines which help in reducing loss of water and also protect the plant from being eaten by animals, for example, spines in cactus

Q6:
Ans: True, atom tendril in grapevine and leaf tendril in pea plant

Oral Questions For Formative Assessment (P-86)

Q1:
Ans: Stamens, pistil or carpel

Q2:
Ans: The honeybee gets the honey and in turn transfers the pollen grains from the anther to the stigma, thus pollinating the flower.

Q3:
Ans: After pollination, the ovary changes into fruit and ovules change into seeds.

For Formative and Summative Assessment (P-87)

Q1:
Ans: b

Q2:
Ans: d

Q3:
Ans: c

Q4:
Ans: b

Q5:
Ans: b

Q6:
Ans: d

Q7:
Ans: c

Q8:
Ans: c

Q9:
Ans: a

Q10:
Ans: c

Part - B

Q1:
Ans: Non-flowering

Q2:
Ans: Herbs

Q3:
Ans: Root system, shoot system

Q4:
Ans: Fibrous roots

Q5:
Ans: Stem

Q6:
Ans: Radish

Q7:
Ans: Prop roots

Q8:
Ans: Tendrils

Q9:
Ans: Lamina

Q10:
Ans: Reticulate

Q11:
Ans: True

Q12:
Ans: Sepals

Q13:
Ans: Pollen grains

Q14:
Ans: Stigma

Part - C

Q1:
Ans: Creepers: Plants with weak stems that cannot stand upright, for example, strawberry.
Climbers: Plants with weak stems that climb up with the help of support, for example, grapevine.

Q2:
Ans: Ginger and onion

Q3:
Ans: The veins in a leaf transport water, minerals, and food, and also provide support to the leaf.

Q4:
Ans: Pollination is the transfer of pollen grains from the anther to the stigma of either the same flower or another flower of the same kind.

Q5:
Ans: Prop roots are the roots growing from the stem or branches of plants like sugarcane and banyan tree. They provide extra support to the plant.

Q6:
Ans: Leaves make food in the presence of sunlight with the help of water from the soil and carbon dioxide in the air. So the leaf is called the food factory of the plant.

Part - D

Q1:
Ans:
a. Functions of root
(i) It fixes the plant firmly to the soil.
(ii) It helps in carrying water and minerals from the soil to all parts of the plant.
(iii) It binds the soil particles and prevents soil erosion.

b. Functions of stem
(i) It keeps the plant upright.
(ii) It bears branches, leaves, flowers, and fruits.
(iii) It transports water, minerals, and the food manufactured by leaves, to all parts of the plant.

c. Functions of leaf
(i) The main function of the leaf is to prepare food from water and carbon dioxide in the presence of a green pigment called chlorophyll which traps sunlight to provide energy.
(ii) Leaves are modified to form tendrils that give support to the plant.
(iii) Leaves are modified to form spines to reduce water loss.

d. Functions of flower
(i) The flower is the reproductive part of the plant.
(ii) After pollination, the flower produces seeds which serve to perpetuate the species.

Q2:
Ans: Tap roots: A tap root consists of a main root from which a number of branching roots arise, for example, mustard, pea, etc.
Fibrous roots: A fibrous root consists of a number of thin fibre-like roots arising from the base of the stem, for example, grass, maize, etc.

Q3:
Ans: Experiment to demonstrate the transportation of water in plants: The stem transports water to all parts of the plant. Cut a balsam plant at the base. Place it in a beaker half-filled with water. Put a few drops of red fountain-pen ink in the water and stir. Let the plant stay in the beaker for a day. Examine it the next day. You will observe thin red lines in the stem and leaves. If the plant has flowers with white petals, we will notice thin red lines on the petals also. Thus, this activity shows that there are thin tubes present in the stem through which water is transported (or conducted) to all parts of the shoot system.

Q4:
Ans: Leaves in a Cactus plant are modified to form spines to prevent loss of water from the surface of the leaves. The green stem in Cactus manufactures food and performs all the functions performed by the leaves in other plants.

Q5:
Ans: Transpiration helps in cooling down the leaves. As the water escapes from the leaves, the roots pull more water to compensate for this loss. This water brings with it important nutrients required by the plant from the soil.

Q6:
Ans: See diagram

HOTS Questions

Q1:
Ans: No, because the small mango plant will grow up to be a tree. A herb always remains small.

Q2:
Ans: Attractiveness of a flower is an adaptation to attract insects for pollination. This adaptation is not necessary in wind-pollinated flowers.

Q3:
Ans: Green plants synthesize their food from simple non-living substances found in nature — water and carbon dioxide. Making food in the kitchen consists of transforming living things into a kind that we can easily digest.