Class 7 Nutrition in Plants Important Questions VBQs

Question. Kumud planned to replace her kitchen garden with some SHRUBS. Identify which plants she could have chosen.
(a) Hibiscus, Rose, Bougainvillea, Henna
(b) Rose, Balsam, Jasmine, Tulsi
(c) Bougainvillea, Henna, Lemon, Papaya
(d) Marigold, Tiger-Lily, Henna, Balsam

Answer : A

Question. To conduct an experiment on plant growth, Lokesh added a cupful of liquid fertilizer each week to a number of plants. The unit that he used to measure the volume of the fertilizer is
(a) cubic metres.
(b) millilitres
(c) kilograms
(d) kilolitres.

Answer : B

Question. Ramesh hammers a nail into the trunk of a young 2m high tree about 10cm from the ground. After 2 years, the tree has grown to a height of about 5m. The nail is still on the tree. At what height from the ground will it be?
(a) about 10 cm from the ground
(b) about 2 metres from the ground
(c) it depends on the tree
(d) it depends on the tree

Answer : A

Question. We know that the leaves make food for a plant. When a seed is planted, before its leaves grow, where does the young plant get its food?
(a) The plant does not need food at that time.
(b) The plant gets food from the soil.
(c) The plant uses food stored in the seed.
(d) The plant uses water as food.

Answer : C

Question. Use the following information to answer the question:
Certain types of mushroom grow on doors which are wet after the rains. These mushrooms can be classified as :-
Autotrophs: Organisms that can prepare their own food
Heterotrophs: Organisms that depend on plants and animals for nutrition
Saprophytes: Organisms that grow on dead and decaying organic matter.
Parasites:Organisms that grow on or feed on a different organism.
(a) Autotrophs
(b) Heterotrophs
(c) Saprophytes
(d) Parasites

Answer : C

Question. It is known that light is not required for moist pea seeds to germinate. However, dry seeds will not germinate even if there is light. Lata sets up 4 experiments using similar pea seeds:
1. Dry pea seeds kept in light.
2. Dry pea seeds kept in the dark.
3. Moist pea seeds kept in light.
4. Moist pea seeds kept in the dark.
In which case(s) will the seeds germinate?
(a) 1 only
(b) 3 only
(c) 3 and 4 only
(d) 1 and 3 only

Answer : C

Question. When a carrot plant grows, the edible root and a leafy top are produced in the first year. Flowers and seeds are produced in the second year. From this we can say that the carrot plant is:
(a) an annual plant
(b) a biennial plant
(c) a triennial plant
(d) a perennial plant

Answer : B

Question. Mohsin and Ganesh carry out an experiment to study the effect of fertilizer use on the number of flowers produced in different plants. The results of their experiment are shown alongside. Which plant showed the highest increase and the highest percentage increase in number of flowers due to use of fertilizer?

(a) A
(b) B
(c) C
(d) D

Answer : B

Question. Organisms that use solar energy to make food are called producers. Which of the following lists contains all the PRODUCERS in this food web?
(a) Grasshoppers, mice, rabbits, birds, hawks and foxes
(b) Grasses, shrubs and grasshoppers
(c) Mice, rabbits and grasshoppers
(d) Grasses and shrubs

Answer : D

Question. What will happen to the population of grasshoppers, if the population of mice and rabbits decreases significantly?
(a) It will increase.
(b) It will decrease.
(c) It will remain the same.
(d) Cannot say.

Answer : A

Question. Which gas will you fill in the empty bubble here? 

(a) Nitrogen
(b) Oxygen
(c) Carbon dioxide
(d) Water vapour.

Answer : A

Question. Use the following information to answer the question.
One of the most common diseases a pet gets infested with is a worm infection in the stomach. 'Tape worm' is one such worm which lives off the nutrients from the stomach of an animal. Tape worms are, therefore, _______.
Autotrophs: Organisms that can prepare their own food
Heterotrophs: Organisms that depend on plants and animals for nutrition
Saprophytes: Organisms that grow on dead and decaying organic matter.
Parasites:Organisms that grow on or feed on a different organism.
(a) Saprophytes
(b) Autotrophs
(c) Heterotrophs
(d) Parasites

Answer : D

Question. It appears from the table that high-energy foods tend to be generally poor in ______
The following table provides details of the energy (kcal), Proteins (g), Carbohydrates (g) and Fats (g) provided by 100g of various foods. Study it and answer the question

(a) protein.
(b) fat.
(c) carbohydrates.
(d) none of these

Answer : A

Question. Raghuram had a meal cooked in 5g of oil. His meal consisted of 25g of dal, 100 g of cereals and a sweet made of 10g of nuts, 1g of ghee and 10 g of sugar. Use the table given below to calculate the total PROTEIN VALUE of his meal?
The following table provides details of the energy (kcal), Proteins (g), Carbohydrates (g) and Fats (g) provided by 100g of various foods. Study it and answer the question

(a) 20g
(b) 30g
(c) 40g
(d) 60g

Answer : A

Question. Only one of these labels actually belongs to a packet of butter. Identify the correct one

Answer : A
 

Fill in the blanks:

1. The components of food that are necessary for our body are called _____.

2. The components of food include _____, _____, ______, ______ and ___.

3. _____ and ______ are directly or indirectly dependent on plants.

4. ______are the only organisms that can prepare their own food using ____, _____, _____, and     ___.

5. ______ is the mode of taking food by an organism and its utilization by the body.

6. The green pigment in leaves is called _____.

7. ______ which is essential for the survival of all organisms is produced during photosynthesis.

8. During photosynthesis plants synthesize ______, which ultimately gets converted into _____.

9. Slimy, green patches in ponds and other stagnant water bodies are due to the growth of organisms called _____.

10. Carbohydrates are made of _____, _____ and _____.

11. _____ are nitrogenous substances that contain nitrogen.

12. Soil has certain ______ that convert gaseous nitrogen into usable form and release it into the soil.

13. Cuscuta (Amerbel) uses _______ mode of nutrition.

14. The Pitcher plant eats ______ and is hence a _______ plant.

15. ______ are organisms that have no chlorophyll and no mouth like animals and feed on dead and decaying organic matter.

16. Some organisms live together and share shelter and nutrition. This is called _____relationship.

17. The organism Lichen has a symbiotic relationship between an___ and a ____

18. ____ and ____ are essential requirements for photosynthesis.

19. ____ energy is stored in the form of food in the leaves with the help of chlorophyll.

20. During photosynthesis plants take in ____ and release _____ into the air.

Answer the following:

1. Where do plants synthesize their food?

2. Why are algae green in colour? Where do they grow?

3. What are the various components of food?

4. Why do organisms need to take food?

5. Name the pores through which leaves exchange gases.

6. How does the following raw material reach the leaves of a plant for preparing food:

a. Water and minerals b. Carbon-dioxide:

7. Explain photosynthesis in brief. Give an equation to represent the process.

8. If two similar potted plants A & B are taken such that:

Plant A is kept in the dark or a black box for 72 hours (3 days), Plant B is kept in sunlight.

Iodine test is conducted with the leaves of both plants. Which plant leaf tests positive for the test and Why?

9. Why is the sun considered as the ultimate source of energy for all things?

10. Define the following and give one example of each:

a. Autotrophic nutrition b. Heterotrophs

11. Label the following diagram of stomata:

12. Give the mode of nutrition for the following:

a. Amerbelb. Rose c. Pitcher plant d. Deer e. Cow

f. Mushroom Pig h .Cabbage i. Yeast j. Man

MULTIPLE CHOICE QUESTIONS:

1. Plants take carbon dioxide from air during photosynthesis from

a. root hair b. leaves c. water d. flowers

2. Presence of starch can be tested by

a. alcohol b. iodine c. water d. hydrochloric acid

3. Which part of plant gets CO2 from air during photosynthesis

a. root hair b. sepal c. stomata d. leaf vein

4. Green plants are also known as

a. autotrophs b. heterotrophs c. carnivores d. saprophytes

5. The green pigment in leaves help to

a. make food b. absorb water c. absorb sunlight d. take in CO2

6. In a cactus plant, the part responsible for photosynthesis is

a. leaf b. thorn c. root d. stem

7. Which of these products is not stored as food in plants

a. protein b. vitamins c. oxalic acid d. oil

8. The simplest carbohydrate made as food during photosynthesis is 

a. starch b. sugar c. glucose d. oil

9. Cuscuta plant can be categorized as

a. parasite b. insectivorous c. saprophyte d. host

10. The plant that traps and feeds on insects

a. cuscuta b. china rose c. rose d. pitcher plant

11. The leather objects that are kept in hot humid weather for a long time are spoiled due to the growth of

a. algae b. yeast c. fungi d. moss

12. The Rhizobium bacteria lives inside the root nodules of

a. peas b. beans c. peanuts d. all of the above

VALUE BASED QUESTION:

Reena segregates the waste at home and put the bio degradable waste in a pot containing soil. She leaves it for 15 days and uses that soil for her plants in the garden. Why do you think she did so?

Lab activity

Objective: To test a leaf for presence of starch.

Materials required: Green leaves, Beaker, tripod stand, burner, test tube, alcohol, iodine solution, petridish, water.

Procedure:

Diagram:

Observation: Conclusion:

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