Life Processes in Plants Class 7 Worksheet with Answers Science Chapter 10 - #NCSOLVE 📚

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Class 7 Science Chapter 10 Life Processes in Plants Worksheet

Class 7 Life Processes in Plants Worksheet

Worksheet On Life Processes in Plants Class 7 – Life Processes in Plants Worksheet Class 7

A. Objective Type Questions

Multiple Choice Questions

Question 1.
Observe the given image and identify the plant(s) that show maximum growth.

(a) Both plants A and B
(b) Both plants A and C
(c) Only plant A
(d) Both plants B and C
Answer:
(c) Only plant A

Question 2.
Leaves are often referred to as the ‘food factories’ of plants. What is the main reason for this?
(a) They produce chlorophyll in the presence of sunlight
(b) They help in the preparation of starch in the presence of sunlight
(c) They store starch produced in the roots
(d) They absorb sunlight for the plant’s growth
Answer:
(b) They help in the preparation of starch in the presence of sunlight

Question 3.
Rina watched her teacher heat a green leaf first in water and then in alcohol. Once the leaf became pale, the teacher added a few drops of iodine solution. The leaf turned blue-black. Which of the following statements best explains this observation?
(a) Alcohol helps the leaf soak up the iodine solution.
(b) Boiling the leaf in water removes all the starch from it.
(c) The blue-black colour shows that starch is present in the leaf.
(d) Iodine turns all green leaves blue-black because of chlorophyll.
Answer:
(c) The blue-black colour shows that starch is present in the leaf.

Question 4.
Why should alcohol never be placed near a heat source directly?
(a) It evaporates quickly, causing a loss of the solution
(b) It is highly flammable and can lead to fire and burns
(c) It loses its effectiveness when exposed to heat
(d) It changes its chemical properties when heated
Answer:
(b) It is highly flammable and can lead to fire and burns

Question 5.
Why do some plant leaves appear red, violet, or brown instead of green?
(a) They contain more coloured pigments than chlorophyll
(b) They lack chlorophyll and cannot perform photosynthesis
(c) They do not have pigments and rely on sunlight for energy
(d) They store starch instead of producing it
Answer:
(a) They contain more coloured pigments than chlorophyll

Question 6.
In the absence of which of the following, photosynthesis will not occur in leaves?
(a) Oxygen
(b) Chlorophyll
(c) Vacuole
(d) Space between cells
Answer:
(b) Chlorophyll

Question 7.
During photosynthesis
(a) Solar energy is converted into chemical energy
(b) Solar energy is converted into mechanical energy
(c) Chemical energy is converted into mechanical energy
(d) Bioenergy is converted into chemical energy
Answer:
(a) Solar energy is converted into chemical energy

Question 8.
Which of the following is absorbed from the air by plants through stomata?
I. Water
II. Nitrogen
III. Carbohydrates
IV. Carbon dioxide
Choose the correct option.
(a) Both I and II
(b) Both II and III
(c) Both III and IV
(d) Only IV
Answer:
(d) Only IV

Question 9.
Which of the following statement (s) is/are correct?
I. All green plants can prepare their food.
II. Most animals are autotrophs.
III. Carbon dioxide is not required for photosynthesis.
IV. Oxygen is liberated during photosynthesis.
Choose the correct option.
(a) Both I and IV
(b) Only II
(c) Both II and III
(d) Both I and II
Answer:
(a) Both I and IV

Question 10.
When we observe the lower surface of a leaf through a magnifying lens, we see numerous small openings. Which of the following terms is given to such openings?
(a) Stomata
(b) Lamina
(c) Midrib
(d) Veins
Answer:
(a) Stomata

Question 11.
A student places a plant in red coloured water and notices red colour in the stem after some time. What does this observation most accurately indicate?
(a) The red colour confirms the presence of chlorophyll in the stem.
(b) Photosynthesis is taking place in the xylem.
(c) Water and minerals are transported upward through the xylem.
(d) Phloem helps in the upward movement of red colour.
Answer:
(c) Water and minerals are transported upward through the xylem.

Question 12.
Identify X and Y in the given equation.
Glucose + X → Y + Water + Energy
(a) X – Carbon dioxide; Y – Oxygen
(b) X – Carbon monoxide; Y – Oxygen
(c) X – Oxygen; Y – Carbon dioxide
(d) X – Oxygen; Y – Carbon monoxide
Answer:
(c) X – Oxygen; Y – Carbon dioxide

Fill in the Blanks

Question 1.
Fill in the blanks by using the suitable word given in the bracket.
(a) ________________ (Chlorophyll/Stomata) is the site of reception of light energy in leaves.
(b) The food-making process in plants is called ________________ (transpiration/photosynthesis).
(c) The glucose is converted into ________________ (glycogen/starch) for storage.
(d) ________________ (Fats/Carbohydrates) are made up of carbon, hydrogen, and oxygen.
(e) Plants have pipe-like ________________ (xylem/phloem) to transport water and nutrients from the soil.
Answer:
(a) Chlorophyll
(b) Photosynthesis
(c) Starch
(d) Carbohydrates
(e) Xylem

Question 2.
Fill in the blanks to complete the following paragraph by using just two words, i.e., photosynthesis and respiration.

Green plants perform two essential life processes, i.e., (a) ________________ and (b) ________________. The process of (c) ________________ takes place in the chloroplasts of green cells, where plants use sunlight, carbon dioxide, and water to produce glucose. This glucose stores energy in the form of chemical bonds. The energy stored during (d) ________________ is later released through the process of (e) ________________, which occurs in all living cells. While (f) ________________ takes place only in the presence of sunlight, (g) ________________ happens all the time, both day and night. During (h) ________________, oxygen is released as a byproduct, whereas (i) ________________ uses oxygen and releases carbon dioxide.
Answer:
(a) photosynthesis
(b) respiration
(c) photosynthesis
(d) photosynthesis
(e) respiration
(f) photosynthesis
(g) respiration
(h) photosynthesis
(i) respiration

True/False

Question 1.
Write ‘T’ for true or ‘F’ for false for the following statements.
(a) The synthesis of food in plants occurs in roots.
(b) During photosynthesis, oxygen is absorbed.
(c) Carbon dioxide is released during the process of photosynthesis.
(d) Stomata are visible only when the leaf is observed under a magnifying glass.
(e) Xylem is found only in the leaves of a plant.
(f) During respiration, glucose is broken down in the presence of oxygen.
Answer:
(a) F
(b) F
(c) F
(d) T
(e) F
(f) T

Question 2.
Given below are the substances found in plants. Write “Yes” under the heading, through which the given substances get transported in the plant, and “No” under through which it does not.

Substances	Xylem	Phloem
(i) Glucose
(ii) Water
(iii) Mineral Nutrients
(iv) Oils

Answer:

Substances	Xylem	Phloem
(i) Glucose	No	Yes
(ii) Water	Yes	No
(iii) Mineral Nutrients	Yes	No
(iv) Oils	No	Yes

Match the Following

Question 1.
Match the following raw materials of photosynthesis in Column I with the place where they are available in Column II.

Column I (Raw materials of photosynthesis)	Column II (Places)
(a) Sunlight	(i) Available in the air
(b) Chlorophyll	(ii) Available in the plant
(c) Carbon dioxide	(iii) Available in the soil
(d) Minerals	(iv) Available during the day

Answer:

Column I (Raw materials of photosynthesis)	Column II (Places)
(a) Sunlight	(iv) Available during the day
(b) Chlorophyll	(ii) Available in the plant
(c) Carbon dioxide	(i) Available in the air
(d) Minerals	(iii) Available in the soil

Question 2.
Match Column I with Column II.

Answer:
(a) (ii)
(b) (iii)
(c) (iv)
(d) (i)

Assertion-Reason Questions

The questions given below consist of an Assertion and a Reason. Based on that, choose the appropriate option.
(a) Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
(b) Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
(c) The assertion is true, but the Reason is false.
(d) The assertion is false, but the Reason is true.

Question 1.
Assertion: All of the plants possess green coloured leaves.
Reason: Leaves contain a pigment called chlorophyll, which imparts green colour to the plants.
Answer:
(d) The assertion is false, but the Reason is true. Assertion can be corrected as not all plants have green leaves; some have red, purple, or variegated leaves due to the presence of other pigments like anthocyanin.

Question 2.
Assertion: Sunlight plays an important role in the formation of starch in plant leaves.
Reason: Green leaves store food in the form of starch, which is produced during photosynthesis.
Answer:
(b) Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.

Question 3.
Assertion: Only the green patches of a leaf, exposed to sunlight, show blue-black colour when tested with iodine.
Reason: Chlorophyll is essential for the formation of starch during photosynthesis.
Answer:
(a) Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.

Question 4.
Assertion: Food prepared in the leaves is transported to all parts of the plant through the phloem.
Reason: Xylem is responsible for the transport of water and minerals from the roots to other parts of the plant.
Answer:
(b) Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.

Case-Based Questions

Observe the given case study and answer the questions that follow.
Anaya placed a freshly cut rose in a vase filled with coloured water. The next morning, she noticed a slight change in the colour of the petals. She also observed that the stem seemed to have faint coloured lines when she cut it open.

Question 1.
Which part of the plant was mainly involved in the transport of coloured water?
(a) Phloem
(b) Chloroplast
(c) Xylem
(d) Epidermis
Answer:
(c) Xylem

Question 2.
If the stem had been placed in the vase upside down, how would the movement of coloured water change?
(a) The water would move downward from the leaves
(b) The water would still move upward through the xylem
(c) The water would not move at all
(d) The water would move downward through the phloem
Answer:
(c) The water would not move at all

B. Subjective Type Questions

Define the Following Terms.

Question 1.
Autotrophs
________________________________________________

Question 2.
Chlorophyll
________________________________________________

Question 3.
Starch
________________________________________________

Question 4.
Stomata
________________________________________________

Question 5.
Xylem
________________________________________________

Question 6.
Respiration
________________________________________________

Very Short Answer Type Questions

Question 1.
Name the type of energy captured by the leaves to form food.
________________________________________________

Question 2.
What is the ultimate source of energy for all living organisms?
________________________________________________

Question 3.
What are the basic requirements for photosynthesis?
________________________________________________

Question 4.
Do plants with red, brown, or violet pigments carry out photosynthesis?
________________________________________________

Question 5.
In which form is the food synthesised by plants stored?
________________________________________________

Question 6.
Where are stomata generally found in a plant?
________________________________________________

Question 7.
Where is xylem found in a plant?
________________________________________________

Question 8.
How does starch reach a potato when food is prepared in the leaves of the plant?
________________________________________________

Question 9.
Why do germinating seeds require oxygen?
________________________________________________

Question 10.
What are the products of the breakdown of glucose in plant cells?
________________________________________________

Short Answer Type Questions

Question 1.
(a) What is so special about leaves that they can synthesise food?
________________________________________________
________________________________________________

(b) A person observes some plants having deep red, violet, and brown coloured leaves. Can these leaves carry out photosynthesis? Give a reason for your answer.
________________________________________________
________________________________________________

Question 2.
Give a reason to support the statement.
In the absence of photosynthesis, life would be impossible on Earth.
________________________________________________
________________________________________________

Question 3.
In the given diagram, what will happen to the leaf inside the bottle and why?

________________________________________________
________________________________________________

Question 4.
How are water and minerals transported to the leaves?
________________________________________________
________________________________________________

Question 5.
Differentiate between xylem and phloem.
________________________________________________
________________________________________________

Question 6.
In the given experiment, why does the lime water turn milky in the test tube connected to the flask?

________________________________________________
________________________________________________

Question 7.
Differentiate between respiration and photosynthesis.
________________________________________________
________________________________________________

Question 8.
How are respiration and photosynthesis connected in nature?
________________________________________________
________________________________________________

Long Answer Type Questions

Question 1.
Explain the process of photosynthesis. State its importance and write the overall chemical equation for the process.
________________________________________________
________________________________________________
________________________________________________
________________________________________________

Question 2.
(a) Why animal body not make food from CO₂, H₂O, and minerals like plants?
________________________________________________
________________________________________________
________________________________________________

(b) How do plants obtain the raw materials necessary for photosynthesis from the surroundings?
________________________________________________
________________________________________________
________________________________________________

Question 3.
The figure given below shows an experimental setup.

(a) The following are the steps needed to do a starch test. Arrange these steps in the correct order.
(i) Pluck a leaf from the plant.
(ii) Leave the potted plant out in the Sun for a few hours.
(iii) Boil the leaf in alcohol.
(iv) Boil the leaf in water.
(v) Wash the leaf and then add a few drops of iodine solution over it.
________________________________________________

(b) After adding iodine, a colour change is observed in parts A and B of the leaf. Give a reason for the observation.

(i) Part A ________________________________________________
(ii) Part B ________________________________________________

Question 4.
Describe an activity that demonstrates how water travels from the soil to other parts of the plant through the xylem.
________________________________________________

Question 5.
Observe the given figure and answer the following questions.

(a) In which jar will the amount of CO₂ be the highest and why?
________________________________________________

(b) In which jar will the amount of CO₂ be the lowest, and why?
________________________________________________

Skill-Based Questions

Question 1.
Observe the given diagram and answer the question that follows.
The picture given below shows the process through which green plants make their food. X, Y, and Z are three different components of this process. The direction of the arrows shows what is absorbed and what is released by the plant. For example, sunlight is absorbed by the plant.
What do X, Y, and Z stand for in the given picture below?

X ________________
Y ________________
Z ________________

Question 2.
Given below is a square of letters in which are hidden different words related to life processes in plants. Find out the words with the help of the clues given below.

(i) Green pigment in plants that is essential for absorbing light energy.
________________________________________________

(ii) Gas taken in by plants from the atmosphere during photosynthesis.
________________________________________________

(iii) The process by which green plants use sunlight, water, and carbon dioxide to create food.
________________________________________________

(iv) The Main storage form of glucose in plants.
________________________________________________

(v) The small pores on the surface of leaves that allow for gas exchange.
________________________________________________

(vi) Vascular tissue in plants that transports water and minerals from the roots.
________________________________________________

Question 3.
Identify the following words with the help of the hints given.
(i) Provides energy needed by plants to carry out photosynthesis.
_ U _ _ I _ _ _

(ii) Commonly used to check the presence of starch in plant leaves.
I O _ I _ _ _ E _ _

(iii) The nutrient produced during photosynthesis.
_ _ U _ O _ E

(iv) Tissue involved in the transport of starch from leaves to other parts of the plant.
_ _ _ O E _

(v) Breakdown of glucose to produce energy and carbon dioxide.
_ _ _ _ I _ _ _ _ _ N

Question 4.
Study the given flowchart and answer the following.
What do the symbols P, Q, and R represent? Also, write down their role in plants.

P – ________________________________________________
Q – ________________________________________________
R – ________________________________________________

The post Life Processes in Plants Class 7 Worksheet with Answers Science Chapter 10 appeared first on Learn CBSE.

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