Flowering and Non-Flowering Plants Note Class 6

 

Flowering and Non-Flowering Plants

Page no. 122

Very short questions

1.      What are non-flowering plants?
The plants that do not bear flowers in any stage of their life are called non-flowering plants.

2.      Give any two examples of non-flowering plants?
The two examples of non-flowering plants are mushroom and mucor.

3.      Why is moss called a non-flowering plant?
Moss is called a non-flowering plant because it does not bear flowers in any stage of its life.

4.      Name the group (cryptogams or phanerogams) of the following plants.
a. Moss à cryptogams
b. Spirogyra à cryptogams
c. Rose à Phanerogams
d. Maize à Phanerogams

5.      What are phanerogams?
Phanerogams are the plants that bear flowers.

6.      Give any two examples of phanerogams.
Two examples of phanerogams are rose and maize.

7.      What are gymnosperms?
The flowering plants having naked seeds are called gymnosperms.

8.      What are angiosperms?
The flowering plants whose seeds are enclosed inside fruits are called angiosperms.

9.      Give any two examples of angiosperms.
Two examples of angiosperms are rose and maize.

10.   How do angiosperms differ from gymnosperms?
Angiosperms differ from gymnosperms because angiosperms have seeds enclosed inside fruits but gymnosperms have naked seeds that are not enclosed in fruits.

11.   What types of roots are found in monocots.
Fibrous roots are found in monocots.

12.   Why is maize called a monocot?
Maize is called a monocot because it has only one cotyledon in its seed.

13.   Why is pea called a dicot?
Pea is called a dicot because it has two cotyledons in its seed.

14.   Write the major function of fruit and seed.
The major function of fruit and seed are:
Fruit: It protects the seed.
Seed: It grows into new plant.

15.   Why are angiosperms called most developed plants?
Angiosperms are called the most developed plants because they produce flowers and fruits, and their seeds are protected inside fruits.

Short questions

1.      Write any two features of the given plants.
चित्र बनाऊ
a. Mushroom
à  It is non-green plant.
à It does not have root, stem and leaves.
b. Onion
à It has one cotyledon in its seeds.
à It has fibrous root.
c. Cycas
à It produces naked seeds.
à It has needle shaped and pointed leaves.
d. Sunflower
à Its seeds are enclosed inside fruits.
à It has xylem and phloem tissues.

2.      Write any two features of each of the given plants.
a. Lotus
à It is covered with water-proof waxy coat.
à It has large and flat leaves.
b. Cactus
à Its leaves are reduced into thorns.
à It has thick and fleshy stem.

3.      Write any two differences between
a. Cryptogams and Phanerogams

Cryptogams	Phanerogams
The plants that do not bear flowers in any stage of their life are called cryptogams.	The plants that bear flowers are called phanerogams.
They reproduce by spores.	They reproduce by seeds.

b. Gymnosperms and Angiosperms

Gymnosperms	Angiosperms
Their seeds are not enclosed inside fruits.	Their seeds are enclosed inside fruits.
They do not have true fruits.	They have true fruits.

4.      Write the function of root and flowers of plants.
The function of root and flowers of plants are:
Root: It absorbs water and minerals.
Flowers: It attracts insects for pollination.

 

5.      Differentiate between monocot and dicot plants.

Monocot plant	Dicot plant
It has only one cotyledon in its seed.	It has two cotyledons in its seed.
It has fibrous root.	It has tap root.
Its leaves have parallel venation.	Its leaves have reticulate venation.

6.      How do gymnosperms differ from angiosperms? Write any two points.

Gymnosperms	Angiosperms
Their seeds are not enclosed inside fruits.	Their seeds are enclosed inside fruits.
They do not have true fruits.	They have true fruits.

7.      You are given two plants A and B. A is a monocot and B is a dicot. Now, write any two features of each plant.
Two features of plant A (monocot) are:
i) It has one cotyledon in its seed.
ii) It has fibrous root.

Two features of plant B (dicot) are:

i) It has two cotyledons in its seed.

ii) It has tap root.

 

Long questions

1.      Study the given figures and answer the following questions.
चित्र बनाऊ
a. Identify cryptogams and phanerogams from above plants.
Cryptogams                                    Phanerogams
Fig (i)                                             Fig (ii), Fig(iii), Fig (iv)
b. How does plant (i) differ from plant (ii)?
Plant (i) does not produce flowers or seeds but plant (ii) produces flowers and seed.
c. Write any two features of plant (iv).
à Its seeds are enclosed inside fruits.
à It has xylem and phloem tissues.
d. Which plant is the most developed among them? Why?
Fig (iv)[Sunflower] is the most developed plant because it is an angiosperm that has well developed root, stem and leaves.

 

2.      Study the characteristics of the plants and answer the following questions.
A à non-flowering, having thalloid body
B à flowering, needle-shaped leaves, naked seeds
C à non-flowering, green with xylem and phloem.
i. Give any one example of plant having features as given in A and C.
One example of A: Marchantia
One example of C: Fern
ii. Write any two more features of the plants given in B.
The two more features of the plants given in B are:
à They have cones which contain seeds.
à They do not have true fruits.
iii. Which plant is the most developed among A, B and C, why?
B (Gymnosperm) is the most developed among A, B and C because:
à It has well-developed vascular tissues (xylem and phloem).
à It produces seeds, which help in better reproduction and survival.
iv. Write down the habitat of plants B and C.
B (Gymnosperm): Mostly found in cold places.
C (Pteridophyte): Found in moist, shady places.