Chapter 1 Nutrition In Plants

Question 1. Organisms which prepare food for themselves using simple naturally available raw materials are referred to as

(a) heterotrophs

(b) autotrophs

(c) parasites

(d) saprophytes

Question 2. In the absence of which of the following will photosynthesis not occur in leaves?

(a) Guard cells

(b) Chlorophyll

(c) Vacuole

(d) Space between cells

Question 3. Which of the following statements is/are correct?

(i) All green plants can prepare their own food.

(ii) Most animals are autotrophs.

(iii) Carbon dioxide is not required for photosynthesis.

(iv) Oxygen is liberated during photosynthesis.

Choose the correct answer from the options below:

(a) (i) and (iv)

(b) (ii) only

(c) (ii) and (iii)

(d) (i) and (ii)

Question 4. Pitcher plant traps insects because it

(a) is a heterotroph.

(b) grows in soils which lack in nitrogen.

(c) does not have chlorophyll.

(d) has a digestive system like human beings.

Question 5. The term that is used for the mode of nutrition in yeast, mushroom and bread-mould is

(a) autotrophic

(b) insectivorous

(c) saprophytic

(d) parasitic

Question 6. When we observe the lower surface of a leaf through a magnifying lens we see numerous small openings. Which of the following is the term given to such openings?

(a) Stomata

(b) Lamina

(c) Midrib

(d) Veins

Question 7. Two organisms are good friends and live together. One provides shelter, water, and nutrients while the other prepares and provides food. Such an association of organisms is termed as

(a) saprophyte

(b) parasite

(c) autotroph

(d) symbiosis

Question 8. Which of the following raw material is available in the air for photosynthesis?

(a) Oxygen

(b) Carbon dioxide

(c) Nitrogen

(d) Hydrogen

Question 9. Potato and ginger are both underground parts that store food. Where is the food prepared in these plants?

Question 10. Photosynthesis requires chlorophyll, and a few other raw materials. Add the missing raw materials to the list given below:

Water, minerals, _____________, ______________.

(a) (b)

Question 11. A goat eats away all the leaves of a small plant (balsam). However, in a few days, new leaves could be seen sprouting in the plant again. How did the plant survive without leaves?

Question 12. Unscramble the following to form terms related to modes of nutrition.

(i) RASPAEIT

(ii) ROPEHYTSAP

(iii) TOROPHAUT

(iv) SIBIOMSYS

Question 13. Nitrogen is an essential nutrient for plant growth. But farmers who cultivate pulse crops like green gram, bengal gram, black gram, etc. do not apply nitrogenous fertilizers during cultivation. Why?

Question 14. Wheat dough if left in the open, after a few days, starts to emit a foul smell and becomes unfit for use. Give reason.

Question 15. Sunlight, chlorophyll, carbon dioxide, water and minerals are raw materials essential for photosynthesis. Do you know where they are available? Fill in the blanks with the appropriate raw materials.

(a) Available in the plant : _______________

(b) Available in the soil : _______________, _______________

(c) Available in the air : _______________

(d) Available during day : _______________

Question 16. Observe the diagram given as Figure 1.1 and label the following terms given in the box.

stomatal opening, guard cell

Question 17. Match the organisms given in Column I with their mode of nutrition given in Column II.

Column I Column II

(i) Mushroom (a) Autotrophs

(ii) Green Plants (b) Heterotrophs

(iii) Amoeba (c) Saprophytes

(iv) Cuscuta (d) Parasite

Question 18. Wild animals like tiger, wolf, lion and leopard do not eat plants. Does this mean that they can survive without plants? Can you provide a suitable explanation?

Question 19. Fill in the blanks of the paragraph given below with the words provided in the box.

chlorophyll, energy, food, carbon dioxide, water, photosynthesis

Note: A word can be used more than once.

Leaves have a green pigment called ( a) which captures (b) from sunlight. This (c) is used in the process of ( d) and along with other raw materials like ( e) and ( f) synthesize (g) .

Question 20. Spot as many organisms as possible in the puzzle given as Figure 1.2 by encircling them as shown. Write the names on a sheet of paper and categorise them into autotrophs and heterotrophs. Classify the heterotrophs into herbivores, carnivores, omnivores and saprophytes.

Question 21. Can you give me a name?

Solve each of the following riddles by writing the name of the organism and its mode of nutrition. One riddle is solved to help you.

(a) I am tall but I cannot move. I am green and can prepare my own food. tree, autotroph

(b) I live in water; people keep me in an aquarium and feed me. ,

(c) I am small and I can fly. I disturb your sleep, bite you and suck your blood which is my food. ,

(d) I am white and soft. I grow well in the rainy season. Children pluck me from the ground and admire me. I absorb nutrients from decomposed dead parts of plants and animals in the soil. ,

Question 22. Answer the following questions in one or two words or sentences:

(a) Why should we prefer to use paper bags rather than polythene bags?

(b) Who, out of the following should properly dispose of the garbage – father, mother, elder brother, younger sister?

(c) Which one out of beetles, roundworm and earthworm are used for vermicomposting and why?