Learning disabilities in Mathematics can be assessed
most appropriately by which of the following tests?
Aptitude tests
MSUNG
&
Diagnostic tests
1
Screening tests
Achievement tests
Answers
Step-by-step explanation:
1 Nutrition in Plants Nutrition in Plants
I
n Class VI you learnt that food is
essential for all living organisms.
You also learnt that carbohydrates,
proteins, fats, vitamins and minerals are
components of food. These components
of food are necessary for our body and
are called nutrients. nutrients
All living organisms require food.
Plants can make their food themselves
but animals including humans cannot.
They get it from plants or animals that
eat plants. Thus, humans and animals
are directly or indirectly dependent on
plants.
1.1 MODE OF NUTRITION IN PLANTS
Plants are the only organisms that can
prepare food for themselves by using
water, carbon dioxide and minerals. The
raw materials are present in their
surroundings.
The nutrients enable living
organisms to build their bodies, to grow,
to repair damaged parts of their bodies
and provide the energy to carry out life
processes. Nutrition is the Nutrition mode of
taking food by an organism and its
utilisation by the body. The mode of
nutrition in which organisms make food
themselves from simple substances is
called autotrophic autotrophic (auto = autotrophic self; trophos
= nourishment) nutrition. Therefore,
plants are called autotrophs. Animals autotrophs
and most other organisms take in ready
made food prepared by the plants. They
are called heterotrophs heterotrophs (heteros =
other).
Boojho wants to know
how plants prepare
their own food.
Now we may ask where the food
factories of plants are located: whether
food is made in all parts of a plant or
only in certain parts? How do plants
obtain the raw materials from the
surroundings? How do they transport
them to the food factories of the plants?
1.2 PHOTOSYNTHESIS — FOOD
MAKING PROCESS IN PLANTS
Leaves are the food factories of plants.
The synthesis of food in plants occurs
in leaves. Therefore, all the raw
materials must reach there. Water and
minerals present in the soil are absorbed
by the roots and transported to the
Paheli wants to know why
our body cannot make food
from carbon dioxide, water
and minerals like plants do.