EVS CH-1 GROWING PLANTS (Notebook exercise,workbook exercise, Additional Question bank)
NOTEBOOK EXERCISE
CH-1 GROWING
PLANTS
NEW WORDS
1.
pollination
2.
cotytledons
3.
dispersal
4.
explosion
5.
threshing
New terms
1.
weeding- removing unwanted plants
2.
fusion- the process or result of joining two or
more things together.
Fill in the blanks:
a. Plants such as ___ferns__ and mosses reproduce
through ____spores__
b. _Pollination___ is the transfer of pollens from
the __anther____ of one
flower to the ____stigma_ of the same or another
flower.
c. Dandelion seeds have fine, long hair around them that
help dispersal by wind_
of these seeds.
. Match the columns.
Column A
|
Column B
|
a. Grow
from stem
|
i.
Coconut
|
b. Grow
from root
|
ii.
Radish
|
c. Dispersal
by explosion
|
iii.
Ginger
|
d. Water
dispersal
|
iv.
Lady finger
|
a-iii, b-ii, c-iv, d-i.
State whether the
following statements are true or false:
a. Mustard is a fibre crop.(false)
b. Bean seeds are usually dispersed by explosion.(true)
c. All plants require only air for germinating.(false)
d. Monocot plants have one cotyledon in their seeds.(true)
e. Rice is a Rabi crop.(false)
Answer the
following questions in 3 to 4 sentences:
a. Define germination and state the conditions required for
it.
·
Ans. Germination is the process by which a seed
produces a baby
plant or a seedling in the
presence of air, water and warmth.
·
A seed cannot germinate if it does not
get right conditions of air, moisture and warmth. If any one condition is not right, the
seed will not grow into a healthy plant.
b. What is pollination? Give examples of different
pollinating agents.
Ans. The process of
transfer of pollens from the anther to the stigma of the same or
another flower is called pollination.
Examples of pollinating agents are
wind,insects.
c. Why are crops sprayed with pesticides?
Ans. Crops are sprayed
with pesticides to protect the crops from pests.
d. Explain the different methods
of vegetative reproduction.
Ans. Vegetative
reproduction is of the following types:
Through
roots
Money-plant
and dahlia develop many roots which then develop
into
shoots, when kept in water.
Through
stems
Many
plants develop roots through
their
stems, which then grow into
new
plants. For example, ginger and
potato
are underground stems which
can
be used to grow plants. Potatoes
have
small buds on their body. A new
potato
plant can be grown from a part
of
the potato with a bud on it.
Through
leaves
Some
plants can grow new plants from their
leaves.
Bryophyllum leaves have tiny buds that
grow
on each leaf. These tiny buds can grow into
a
completely new plant under right conditions.
Through
spores
Mosses
and ferns reproduce with the help of
spores,
because they do not have flowers and
therefore
no seeds.
Ferns
have leaves with pores on the underside that
help
the plant to breathe. They also have pods
called
sori that contain spores which germinate
and
develop into new plants.
HOTS
Akash wanted to see plant growth so he kept some bean seeds
in
dry soil, gave proper sunlight and air. Will his plant grow?
Why or
why not?
Ans. The plant will
not grow because it does not get water as the soil is dry. Because a plant
needs all the important factors for germination that is air, water and sunlight.
1.
Fill in the blanks. (R)
a)
_____________
are small leaf-like structures present at the base of a flower.
Ans:
sepals
b)
Ginger and potato are underground ____________ which can be used
to grow plants.
Ans:
stems
c)
The process of fusion of pollens and ___________ in the ovary is
called fertilization.
Ans:
ovules
d)
_______________ is the process by which seeds are scattered away
from the mother plant.
Ans:
Explosion
|
2. Match the following: (U)
|
|
|
|
Plants
|
Vegetative
Reproduction method
|
|
|
a) Dahlia
|
i)Through stems
|
|
|
b)
|
Potato
|
ii) Through leaves
|
|
c)
|
Bryophyllum
|
iii)Through spores
|
|
d)
|
Ferns
|
iv)Through roots
|
Ans: a)
iv), b) i), c) ii) d) iii)
3.
Give three examples of following (R)
a)
Kharif crops
Ans:
Rice, maize, jowar, bajra, pulses, peanuts, jute and cotton (accept any three
correct answers)
b)
Rabi crops
Ans: Wheat, barley, peas, gram, and mustard. (Accept any three
correct answers)
c) Oil-producing plants
Ans:
mustard, sunflower and soybean
4.
Answer in one sentence. (U)
a)
Give functions of the
following.
(i)
Petals
Ans:
The main function of petals is to attract insects and birds.
(ii)
Sepals
Ans: The
main function of sepals is to protect the flower in the budding stage.
b) What is pollination?
Ans: The
process of transfer of pollens grains from the anther to the stigma of the same
or another flower is called pollination.
c)
Name the parts of a
pistil.
Ans: A
pistil consists of three parts: stigma, style and ovary.
5.
Give reasons. (An)
a)
Seeds
should not be sown too close to each other.
Ans: If
seeds are sown too close to each other, they will not be able to grow because
seeds need proper space to germinate.
b)
Crops
are sprayed with pesticides.
Ans: Crops are sprayed with pesticides to protect them
from the different types of pests.
Embryo
Cotyledon
Seedcoat
7. Sameera
wanted to plant a potato with small buds in a pot. After some days, she noticed
that the plant was growing but she could not see any potatoes on the plant. Why
could Sameera not see any potatoes on the plant?
Ans:
Potatoes are modified stems that grow under the soil and not on the plant. Due
to this Sameera could not see potatoes on the plant.
9. Higher Order
Thinking questions (HOTS) (Ap)
It has been observed that there is a
sharp decrease in the population of butterflies and honeybees in recent years.
Butterflies and honeybees are important for plants. What will happen if their
number continues to drop? Suggest ways to improve the number of butterflies and
honeybees in your area.
Ans: If the number of butterflies and honeybees continues to
drop, it will be difficult for the plants to pollinate. Some plants may not
give rise to new plants due to this. We can plant flowering plants or trees in
our area and take care of them. This will attract butterflies and honeybees and
help increase their number.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
PODAR
INTERNATIONAL SCHOOL, VADODARA(2020-21)
GRADE-
5 Subject- EVS
Ch-1
Growing Plants
Question
Bank
Note
:Below highlighted words are the key
words
Answer the following:
Q.1 What is function of
stigma?
Ans. Stigma is the sticky tip of the pistil which functions to receive
the pollen grains.
Q.2 What is the function of sepals?
Ans.The main
function of Sepals is to protect the flower in the budding stage.
Q.3 State the difference between self pollination and Cross pollination?
Ans. When the pollens are transferred to the stigma
of the same flower, it is
called self-pollination and when they are transferred to the stigma
of a different flower it is
called cross-pollination.
Q.4 What is the function of
seed coat?
Ans. Seed coat protects the
seed along with the embryo inside.
It has a tiny pore which allows water and air to enter.
Q.5 What is the function of
cotyledon?
Ans. On removing the seed coat, you will be able to see two
seed leaves or cotyledons which store
food for the embryo. The food
stored is used by the baby plant till it grows the first green leaves.
Q.6 Give two examples of
monocotyledons and dicotyledons.
Ans. Monocotyledons-- maize,
rice
Dicotyledons.-- gram, bean
Q.7. What is Germination? State
the factors required for germination.
Ans. Germination is the
process by which a seed produces a baby
plant or a seedling in the presence
of air, water and warmth.
A seed cannot germinate if it does not get
right conditions of air, moisture
and warmth. If any one condition is
not right, the seed will not grow into a healthy plant.
Q.8 Why seeds require adequate
space while growing?
Ans. Seeds also need
proper space to germinate. If seeds are sown too close to each other, they will
not be able to grow. Thus, seeds are dispersed
in different ways to ensure that
there is adequate space between them
and they are not starved of nutrients.
Q.9 Write the difference between Kharif crops and
rabi crops?
Ans.
|
Kharif Crops
|
Rabi Crops
|
|
They are
grown in the rainy season from June to September.
|
They are
grown in the winter season, i.e.
from November to January
|
|
Examples:
Rice, maize, jowar, bajra, pulses,
peanuts, jute and cotton.
|
Examples:
Wheat, barley, peas, gram and
mustard
|
Q.10 Why Mosses and Ferns produce through spores?
Ans. Mosses and ferns reproduce
with the help of spores, because they do
not have flowers and therefore no
seeds.
Q.11 What is the function of pores and sori in
ferns?
Ans. Ferns have
leaves with pores on the underside
that help the plant to breathe. They
also have pods called sori that contain spores which germinate and develop into new plants.
Q.12 What is Agriculture?
Ans. Agriculture --It
is the science of growing plants on a large scale for food and biological raw
material.
