Class 6 Science Chapter 4 Case Based Questions - Getting to Know Plants

Case 1

In a botanical garden, a group of students is observing different types of plants. They come across a plant with a very fragile, long, thin stem that creeps on the ground.

Q1: What type of plant is this?
Ans: This plant is a creeper.

Q2: Give examples of two other plants that are considered creepers.
Ans: Two examples of creepers are watermelon and strawberry.

Q3: What is the main function of the stem in a creeper?
Ans :The main function of the stem in a creeper is to provide support for the plant and carry its weight.

Q4: Which of the following is not a characteristic of creepers?
(a) Fragile, long, thin stem
(b) Grow vertically without support
(c) Cannot stand erect
(d) Examples include pumpkin and sweet potatoes
Ans: (b) Grow vertically without support

Q5: How do creepers differ from climbers?
Ans Creepers have very thin, long, and fragile stems that creep on the ground and cannot stand erect, while climbers have thin, long stems that use external support to grow vertically and carry their weight. Climbers often have special structures called tendrils to help them climb.

Case 2

In a garden, there are several plants with bushy and medium-sized structures. The students want to identify the type of plants they are.

Q6: What type of plants are these?
Ans: These plants are shrubs.

Q7: Give examples of two other shrub plants.
Ans: Two examples of shrubs are lemon and henna.

Q8: How do shrubs differ from herbs and trees in terms of their size and structure?
Ans: Shrubs are medium-sized plants with bushy structures, and their branches start from just above the ground. In contrast, herbs are small plants with soft stems, and trees are tall and large plants with hard and woody stems.

Q9:  Which of the following plants is not a shrub?
(a) Lemon
(b) Coriander
(c) Mango
(d) Rose
Ans: (c) Mango

Q10: Explain the main function of the stem in shrub plants.
Ans: The main function of the stem in shrub plants is to provide structural support, bear branches, leaves, flowers, and fruits, and transport water and minerals from the roots to different parts of the plant.

Case 3

A student is examining a plant in the garden that has a tall and large structure with a hard and woody stem. They notice that a single main stem arises from the ground and gives out many branches at a certain height.

Q11: What type of plant is this?
Ans: This plant is a tree.

Q12: Give examples of two other tree plants.
Ans: Two examples of trees are mango and coconut.

Q13: Describe the structure of a tree and how it differs from shrubs and herbs.
Ans: Trees have a tall and large structure with a hard and woody stem. A single main stem, called the trunk, arises from the ground and gives out many branches at a certain height. This is different from shrubs, which are medium-sized with bushy structures, and herbs, which are small plants with soft stems.

Q14: Which part of a tree is known as the trunk?
(a) Roots
(b) Leaves
(c) Main stem
(d) Branches
Ans: (c) Main stem

Q15: Explain the functions of the trunk of a tree.
Ans: The trunk of a tree provides structural support to the plant, bears branches, leaves, flowers, and fruits, and also serves as a pathway for the transport of water and minerals from the roots to other parts of the plant.

Case 4

A group of students is exploring different parts of a leaf on a plant in the garden.

Q16: What is the green structure on the plant from which leaves arise?
Ans: The green structure from which leaves arise is the stem.

Q17: Describe the parts of a leaf.
Ans: A leaf typically has a petiole, lamina, a midrib, and veins. Only some leaves also have a petiole, which attaches the leaf to the stem.

Q18: What is the function of green-colored substance in leaves?
Ans: The green-colored pigment in leaves plays a crucial role in photosynthesis, the process by which plants prepare food from carbon dioxide and water in the presence of sunlight.

Q19: Which of the following is not a part of a leaf?
(a) Petiole
(b) Lamina
(c) Veins
(d) Nodes
Ans: (d) Nodes

Q20: Explain the importance of transpiration in leaves.
Ans: It helps in the removal of unwanted water in the form of water vapor.

Case 5

A student is examining a colorful flower on a plant in the garden and notices different parts of the flower.

Q21: What is the most colorful and attractive part of a flowering plant?
Ans: The most colorful and attractive part of a flowering plant is the petals.

Q22: List the different parts of a flower and their functions.
Ans:

• Sepal: The outer green leafy structure that protects the flower at the bud stage.
• Petals: The colored leaf-like structures that attract insects and aid in reproduction.
• Stamens: The male part of the flower, consisting of a filament and an anther that produces pollen grains.
• Pistil: The female part of the flower, which includes the ovary, style, and stigma.

Q23: What is the function of the petals in a flower?
Ans: The function of petals in a flower is to attract insects, which aids in the process of pollination and reproduction.

Q24: What is the male part of a flower?
(a) Sepal
(b) Petals
(c) Stamens
(d) Pistil
Ans: (c) Stamens

Q25: Explain the ovary in flowering plants.
Ans:  It is the enlarged basal portion of the pistil, the female organ of a flower. The ovary contains ovules.