NCERT Biology- 1

Question 1

arrange:

Fibre, fabric, yarn

Answer 1

Fibre -> Yarn -> Fabrics

Question 2

Wool, silk obtained from

Answer 2

Animal

Question 3

Cotton, jute obtained from

Answer 3

Plants

Question 4

Example of natural fibre

Answer 4

Fibre obtained from plants and animals

Flax Wool silk etc

Question 5

Fibre are obtained from:
Wool
silk fibre

Answer 5

fleece of sheep or goat/ hairs of rabbit camel yak

Cocoon of silkworm (Malbari plant)

Question 6

3 example of plyster

Answer 6

polyester, nylon and acrylic

Question 7

ginning of cotton

Answer 7

from cotton balls, cottons is usually picked by seeds by combing, and process is k/a ginning of cotton

Question 8

cotton is grown in 2 condition

Answer 8

black soil and
Warm climate

Gujrat, odisha, T.N. Karnatka, Andhra pradesh

Question 9

cotton bolls

Answer 9

fruits of cotton plant,

After maturing bolls brust open and seeds covered with cotton fibre can be seen.

Question 10

Jute is found from which part of the plant

cultivated in which season?

how is it created?

Answer 10

Stem

Rainy season

then it is immersed in water for a few days and the stem rot and fibre are seperated by hands

Question 11

spinning

Answer 11

the process of amking yarn from fibres

mass of cotton wool are drawn out and twisted which brings the fibres together to form a yarn

Question 12

hand spindle
or
Takli

Answer 12

simple device used for spinning is a hand spindle or takli

Question 13

to popularise and promote khadi, GOI constituted a body

comes under

Answer 13

Khadi and Village Industries Commission (1956)

Constitutional body

MoMSME

to plan promote and facilitate organise and help in establishment and development of khadi and village industries in the rural areas in cordination with other agemcies

Question 14

two main processes to make fabrics from yarn

Answer 14

Weaving

Knitting

Question 15

weaving

Answer 15

arrange 2 sets of yarns together to make fabrics

Question 16

knitting

Answer 16

a single yarn is used to make a piece of fabrics

Question 17

types of plants based on stem and branches

Answer 17

herbs: less branch
shrubs: more branches
trees: most branches and strogest.

Question 18

Creepers

Answer 18

Plants with weak stems that cannot stand upright but spread on the ground

Question 19

Petiole

Lamina

Answer 19

part of leaf by which it is attached to the stem is called petiole

The broad, green part of the leaf is called Lamina

Question 20

First oxygen was generated by?

Answer 20

Bacteria

not tree

Question 21

Viens

Mid rib

leaf venation

reticulate

parallel venation

Answer 21

Lines on the leaf is called veins. prominent line in the mid is called midrib
the design made by veins is called leaf venation
if this design is net-like on both side of midrib, the venation is called reticulate.
if veins are parallel to one another then called as parallel venation

Question 22

Transpiration is done by

Answer 22

Stomata
Small opening in leaves for exchange of gases.

process is called as necessary evil.

Question 23

2 types of root systems are

Answer 23

Tap-root system: there is one tap(main) root while others smaller root called lateral root

Fibrous root system: All roots are of same type.

Question 24

Roots that we eat:

Answer 24

Carrot, raddish, sweetpotato, turnip,

Question 25

flower

Answer 25

flowers are reproductive structure of a plant

Question 26

flower con

Answer 26

tepal: 
Petals
Sepal: Green covering
Stamen: Male reproductive organ
Pistil: female reproductive organ

Question 27

male reproductive parts

Answer 27

Stamens has Anther which contain pollen grains in it.

Pollen grains from stamens go to pistil.

Question 28

female reproductive organ

Stigma

Style

Answer 28

Pistil has ovary
contains ovules.

part of a flower that gets pollen from pollinators such as bees. The stigma is part of the female reproductive part of a flower, the pistil.

style is a structure found within the flower. It is a long, slender stalk that connects the stigma and the ovary. The stigma is at the top of the style and is a sticky platform where pollen is deposited

Question 29

Number of bones in body

Answer 29

206 bones

Question 30

ball and joint joint
type of movement
example

Answer 30

allows circular motion
Most movement
Arms and shoulder joint

Question 31

pivotal joint

Answer 31

where neck joins head

Movement: forward-backward, left-right

Question 32

hinge joint

Answer 32

elbow joint

restricted movement

Question 33

Fixed joint

Answer 33

no movement

Skull joints

Question 34

backbone

Vertebrae number

Answer 34

33 vertebrae

Rib cage is joint to these bones

Question 35

phalanges

Answer 35

bones that make up the fingers of the hand and the toes of the foot.
56 in number

Question 36

carpel

Answer 36

bones of the palm

8 carpel

Question 37

number of ribs

Answer 37

12 ribs

Question 38

cockroach outer skeleton is made up of:

Answer 38

Kitchen

Question 39

type of bones bird have:

forelimbs

Answer 39

Hollow bones that help them in flight

wings are modified forelimbs

Question 40

streamlined

Answer 40

Head and tail of fish is smaller than middle portion, so that water can move around it.

Question 41

snake movement

Answer 41

loop

Question 42

cartilage

Answer 42

less than bone more than muscle