Very Short Q & A :
Ques 1: Name some components of food.
Ans: Carbohydrates, proteins, fats, vitamins and minerals.
Ques 2: Define nutrients.
Ans: Carbohydrates, proteins, fats, vitamins and minerals are essential components of food, these components are called nutrients.
Ques 3: Give an example of autotrophs.
Ans: All green plants.
Fig: Green plants
Ques 4: Give an example of heterotrophs.
Ans: Animals and human beings.
Ques 5: Plants prepare their food by using raw materials present in __________________.
Ques 6: What do you mean by nutrition?
Ans: Nutrition is the mode of taking food by an organism and its utilisation by body.
Ques 7: Name the food factories of plants.
Fig: Green leaves
Ques 8: Name the tiny pores present on the surface of leaves.
Ques 9: Name the green pigment present in leaves.
Ques 10: ____________ helps leaves to capture the energy of sunlight
Ques 11: Why photosynthesis is named so?
Ans: Because the synthesis of food occurs in presence of sunlight.
Ques 12: Sun is the ultimate source of energy for all living organisms. True / False
Ques 13: Where does the nucleus of cell lies?
Ans: In the centre of cell.
Ques 14: State the equation for the process of photosynthesis.
Ans: Carbon dioxide + water —————> carbohydrate + Oxygen
Ques 15: The nucleus in a cell is surrounded by a jelly like substance called ___________.
Ques 16: Why algae present in stagnant water bodies are green in colour?
Ans: because they contain green colour pigment chlorophyll.
Fig: Chlorophyll cellsQues 17: Name a component of food other than carbohydrate synthesize by plants.
Ans: proteins and fats
Ques 18: Name some insectivorous plants.
Ans: Pitcher plants and Venus flytraps are insectivorous plants.
Ques 19: In saprotrophic mode of nutrition organisms take in nutrients from
a. Oxygen mask
b. Water mask
c. Pollution mask
d. None of these
Ans: Both a and b.
Fig: Venus Flytrap
Ques 20: During photosynthesis plants take in _______________ and releases _______________.
Ans: Carbon dioxide and oxygen
Ques 21: Some organisms live together and share shelter and nutrients, this type of relationship is called
Ans: Symbiotic relationship.
Ques 22: Lichen is a symbiotic association between __________ and fungi.
Ans: algae and fungi.
Ques 23: Name the edible fungi.
Ques 24: Name the organism responsible for converting atmospheric nitrogen into soluble forms.
Ans: Rhizobium bacteria.
Fig: RhizobiumQues 25: Where we can see Rhizobium bacteria?
a. Dead matter
b. Decaying matter
c. Both a and b
d. None of these
Ans: In root nodules of gram, peas, moong, beans and other leguminous plants.
Ques 26: Give an example of parasites.
Ans: Cuscuta plants.
Ques 27: Give an example of saprotrophs.
Ques 28: Amarbel is an example of
Ques 29: Carbon dioxide is released during photosynthesis. True/ False.
Ques 30: During photosynthesis solar energy is converted into chemical energy. True/ False.
Ques 31: The product of photosynthesis is
d. All of these
Ans: All of these
Ques 32: Name a plant that has both autotrophic and heterotrophic mode of nutrition.
Ans: Insectivorous plants
Ques 33: Name a parasitic plant with yellow, slender and tubular type of stem.
Ques 34: Name the pores present in leaves through which exchange of gas takes place.
Ques 35: Animals are autotrophs. True/ False.