Post on 06-Jan-2022
Class -10th
Subject- Mathematics
Date -13/05/2020
Chapter- Statistic
(Do it in your practice notebook)
*Solve questions from 14.3 exercise NCERT
MD SR. SEC SCHOOL, MANKROLA
CLASS : 10 TH
SUBJECT : SCIENCE (BIOLOGY)
HOME ASSIGNMENTS DATE : 13/05/2020
CHAPTER : 7 HOW DO ORGANISM REPRODUCE
Good Morning students .
Today we will study about different types of vegetative reproduction
and sexual reproduction.
Write these notes in your fair note book.
Vegetative Propagation
A mode of reproduction in which reproduction takes place from the
vegetative parts like the stem, root, leaves.
Methods of Vegetative Propagation
Natural
1. By Roots : E.g. adventitious roots of Dahlias
2. By Stems : E.g. Potato (tuber), ginger (rhizome)
3. By Leaves :E.g. leaves of bryophyllum bear adventitious buds (in the
notches of leaf margin) which develop into new plants.
Artificial
1. Grafting : E.g. Mango.
2. Cutting : E.g. Rose
3. Layering : E.g. Jasmine
4. Tissue adture : E.g. Orchids, Ornamental Plants.
Benefits of Vegetative Propagation
1. Plants can bear flowers, fruits earlier than those produced from seeds.
2. Growing plants like Banana, orange, rose, jasmine that have lost the
capacity to produce seeds.
3. Genetical similarity is maintained in the plants.
4. Helps in growing seedless fruits.
5. Cheaper and easier method of growing plants.
Sexual Reproduction
When reproduction takes place as a result of fusion of two gamets, one
from each parent, it is called sexual reproduction.
The process of fusion of male and female gametes is called
fertilization.
The formation of gamets involves exchange of chromosomal
(genetic)fragments between homologous chromosomes causing
genetic recombination which leads to variation.
Sexual Reproduction in Plants
It occurs mostly in flowering plants. In fact flowers are the reproductive
organ of plants.
FLOWERS
Bisexual Flowers
Both male and female reproductive
part i.e., stamen & carpel are present
& carpel are present. Eg. Hibiscus, mustard
Multiple Fission
The parent cell divides into many
daughter cell simultaneously.
Eg. Plasmodium
A typical flower consists of four main whorls namely calyx (sepals),
Corolla (Petals), Androecium (Stamens) and Gynoecium (Carpels).
Pollen grains of a flower , transfer to the stigma of the carpel of the
same flower (Self-Pollination)or to the stigma of carpel of the
another flower (Cross-Pollination).
This transfer of pollens is achieved by agent like wind, water or
animals.
After Pollination, a pollen tube grows out of pollen grains, through
which male germ cell reaches the ovary and fuses with the female
germ cell.
Fertilization : The fusion of male and female gamete is called
fertilization. It occurs inside the ovary. Zygote is produced in this
process.
OVARY->OVULE->EGG CELL AND POLAR NUCLEI.
Zygote divides several times to form an embryo within the ovule.
The ovule develops a tough coat and is converted into a seed.
Ovary grows rapidly and ripens to forms a fruit, while the seed
contains the future plant or embryo which develops into a seedling
under suitable condition. This process is known as Germination.
Flowers can also be unisexual(contain either stamen or carpel) or
bisexual(contains both stamen and carpel).
Unisexual flowers :PAPAYA ,WATERMELON .Bisexual
flowers:HIBISCUS,MUSTARD.
Class 10 Kritika II – Chapter 1:
1. यह ह ह
, य ह श ण ह झ
ह ह ह ?
ह ह ह ह ह य औ ह ह उ ई उ श य ह श य उ ह ह य ह ह
2. य ह ?
ण ण ह ह ह
उ ह उ ह- ह ह उ ह ह ह य ह ह उ ह उ ह
ह
4. औ उ य औ औ ह ?
औ उ ह ह | उ , , , , घ - ह ह श ह |
ह ण ह | ह , , , ह- ह य , ह ह | य ह ह ह ह |
5. ण ह ?
Class 10 Kritika II – Chapter 1:
1. ई श
ह ह ह ह यण ई यह ह ह ह औ उ श ई ह ण ह 2. घ घ
उ , उ झ झ ह औ उ य , उ 3. श ह औ औ ह ह य ह
6. उ श श ण ह ण
ह ई ह
श ह - - ह - ह उ ह – ह य ह ह य - ण ह औ ह
ण ह
ण , , य औ - ह शह ह ह ह , , , , औ उ ह : 9
8. यह - ह , उ श
ह ह श य उ ह , ह , , य औ उ श ह उ ह ह
ह
उ - ह ह ओ ह
ह ओ उ ह य य ह श य ह
Class 10 Kritika II – Chapter 1:
ह ह ह ह उ ह 9. श उ य ई श झ
ह उ य ह ह
झ य य य ह
ह उ य ह श ह ह उ ह ह ह , ह उ ह ह ह ह य ह श ह उ य य ह , उ : ह , उ
ह ह ह ह य ह ह यह य उ य
ह उ य श औ ह ह ह ह ह
10. - ह ?
− ई ह ह :–
1. − य ह 2. − ह 3. − - य ह
श ह
4. − ह य ह घ य ह 5. − य 11. य ई ह ह य ह
ह ?
यह ह उ य ह ह
ह ह ह औ उ
उ , , , , य ह . ., ह य ह य , , , ह ह
M.D. SR. SEC. SCHOOL, MANKROLA, GURUGRAM
CLASS-X
HOMEWORK FILE Dated- 13-05-20
ARTICLE-WRITING DIGITAL INDIA
The Government of India to strengthen the digital society and government
departments and the citizens of India to digitally integrate so that “Digital India
campaign” is launched by our prime minister. The campaign is launched by our
government for giving services electronically.
Digital India is as a utility for every citizen; to provide services to citizens the
availability of high speed Internet. To provide a digital identity to all citizens of
India. The availability of government and public services: integrated services
departments. We know that when we have mobile on platform then we can
know the train exact timing to come on platform, so government given us the
wifi- free for making India digital. Making electronic and cashless financial
transactions.
Universal access to digital resources: Indian language digital resources /
availability of services also. "Digital Locker" name, the government has
launched a digital locker. Digital locker system aims to reduce the use of
physical documents, and different agencies to enable the exchange of e-
documents. MyGov.in a partnership between citizens and the government to
establish a new platform which has been implemented.
Digital India, a great contribution from government in the development of the
country.