Science Chapter 1 - Nutrition
in Plants
Class- 7
NCERT Important
Questions
Very Short Answer Type
Questions
Question1: Name some
components of food.
Answer: Carbohydrates,
proteins, fats, vitamins and minerals.
Question 2: Define
nutrients.
Answer: Carbohydrates,
proteins, fats, vitamins and minerals are essential components of food, these
components are called nutrients.
Question 3: Give an
example of autotrophs.
Answer: All green
plants.
Question 4: Give an
example of heterotrophs.
Answer: Animals and
human beings.
Question 5: Plants
prepare their food by using raw materials present in --------
Answer: Surrounding
Question 6: What do you
mean by nutrition?
Answer: Nutrition is
the mode of taking food by an organism and its utilisation by body.
Question 7: Name the food
factories of plants.
Answer: Leaves
Question 8: Name the tiny
pores present on the surface of leaves.
Answer: Stomata
Question 9: Name the
green pigment present in leaves.
Answer: Chlorophyll
Question 10: ______ helps
leaves to capture the energy of sunlight
Answer: Chlorophyll
Question 11: Why
photosynthesis is named so?
Answer: Because the
synthesis of food occurs in presence of sunlight.
Question 12: Sun is the
ultimate source of energy for all living organisms. True / False
Answer: True
Question 13: Where does
the nucleus of cell lies?
Answer: In the centre
of cell.
Question 14: State the
equation for the process of photosynthesis.
Answer: Carbon dioxide + water — carbohydrate + Oxygen
Question 15: The nucleus
in a cell is surrounded by a jelly like substance called ----------
Answer: cytoplasm
Question 16: Why algae
present in stagnant water bodies are green in colour?
Answer: Because they
contain green colour pigment chlorophyll.
Question 17: Name a
component of food other than carbohydrate synthesize by plants.
Answer: proteins and
fats
Question 18: Name some
insectivorous plants.
Answer: Pitcher plants
and Venus flytraps are insectivorous plants.
Question 19: During
photosynthesis plants take in -----------and releases -------
Answer: Carbon
dioxide , oxygen
Question 20: Some
organisms live together and share shelter and nutrients, this type of
relationship is called -----------
Answer: Symbiotic
relationship.
Question 21. Lichen is a
symbiotic association between --------------------
Answer: algae and
fungi.
Question 22: Name the
edible fungi.
Answer: Mushroom.
Question 23: Name the
organism responsible for converting atmospheric nitrogen into soluble forms.
Answer: Rhizobium
bacteria.
Question 24: Give an
example of parasites.
Answer: Cuscuta plants.
Question 25: Give an
example of saprotrophs.
Answer: Fungi
Question 26: Carbon
dioxide is released during photosynthesis. True/ False.
Answer: False
Question 27: During
photosynthesis solar energy is converted into chemical energy. True/ False.
Answer: True
Question 28: Name a plant
that has both autotrophic and heterotrophic mode of nutrition.
Answer: Insectivorous
plants
Question 29: Name a
parasitic plant with yellow, slender and tubular type of stem.
Answer: Amarbel
Question 30: Name the
pores present in leaves through which exchange of gas takes place.
Answer: Stomata
Question 31: Animals are
autotrophs. True/ False.
Answer: False
Question 32. Define parasites.
Answer: Parasites are those organisms which grow on other
plants or animals for their food, e.g. Cuscuta.
Question 33. Name the bacteria that can fix
atmospheric nitrogen.
Answer: Rhizobium is the bacterium which
can fix atmospheric nitrogen.
Question 34 . Name a parasitic plant with yellow,
slender and tubular stem.
Answer: Cuscuta
Question 35. Give one example of parasite.
Answer: Amarbel
Question 36 . Name one plant that traps and feeds
on insects.
Answer: Pitcher
Plant
Question 37. Name a plant that has both
autotrophic and heterotrophic mode of nutrition. Answer: Insectivorous
Plant
Question 38. What are fluffy umbrella-like
patches growing on rotting wood during the rainy season called?
Answer: These organisms are called fungi.
Question 39. How can cells be seen?
Answer: Most type of
cells can be seen only under the microscope.
Question 40. Where is nucleus located in a cell?
Answer: In most of the cell, nucleus is centrally
located.
Question 41. What are carbohydrates made up of ?
Answer: The
carbohydrates are made of carbon, hydrogen and oxygen.
Question 42. From where do plants get raw
materials to prepare their food?
Answer: Plants get raw materials to prepare their food from
their surroundings.
Question 43. Where does the synthesis of food in
a plant usually take place?
Answer: The synthesis of food in plants occurs in leaves.
Question 44. What is the ultimate source of
energy for all living organisms?
Answer: Sun is the ultimate source of energy for all living
organisms.
Question 45. Why do some plants feed on insects?
Answer: Insectivorous plants grow in soil which lack
nitrogen, therefore they eat insects to fulfil their need of nitrogen.
Question 46 . What are the components of food?
Answer: Carbohydrates,
proteins, fats, vitamins and minerals are components of food.
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