Samacheer Kalvi 7th Science Term 1 Unit 5 Book Back Question and Answers/Solutions:
Samacheer Kalvi Class 7th Std Science Book Back 1 Mark and 2 Mark Question & Answers PDF uploaded and available below. Class 7th Standard New Syllabus 2022 to 2023 Book Back Question & Answer solutions available for both English and Tamil Medium. Class 7 New Science Book Term 1 Unit 5 – Reproduction and Modification in Plants Answers/Solutions Guide are provided on this page. 7th Std Science Book is of 1st Term consists of 7 units, 2nd and 3rd Term consists of 6 units. All Units/Chapters of Term 1st, 2nd, 3rd Science Book Back One, and Two Mark Solutions are given below.
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Samacheer Kalvi 7th Science Book Back Chapter 5 Term 1 Answers/Solutions Guide PDF:
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7th Science – Term 1 Chapter 5
Reproduction and Modification in Plants
I. Choose the appropriate answer :
1. Vegetative propagation by leaves takes place in
(a) Bryophyllum
(b) Fungi
(c) Virus
(d) Bacteria
Answer:
(a) Bryophyllum
2. Asexual reproduction in yeast is
(a) Spore formation
(b) Fragmentation
(c) Pollination
(d) Budding
Answer:
(d) Budding
3. Reproductive part of a plant is
(a) Root
(b) Stem
(c) Leaf
(d) Flower
Answer:
(d) Flower
4. Pollinators are
(a) Wind
(b) Water
(c) Insect
(d) All the above
Answer:
d) All the above
5. Climbing roots are seen in
(a) Betel
(b) Black pepper
(c) Both of them
(d) None of them
Answer:
(c) Both of them
II. Fill in the blanks :
- The male reproductive part of a flower is __________
- __________ is the basal swollen part of the Gynoecium.
- After fertilization the ovule becomes __________
- Breathing roots are seen in __________ plants.
- Onion and Garlic are example of __________
Answer:
- Androecium
- Ovary
- seed
- mangrove
- Bulb
III. True (or) False, unrite the correct answer for the false statement.
1. A complete flower has four whorls.
Answer:
True
2. The transfer of pollen to the stigma is known as pollination.
Answer:
True
3. Conical shaped root is carrot.
Answer:
True
4. Ginger is an underground root.
Answer:
(False) Correct Statement: Ginger is an underground stem.
5. Leaves of Aloe vera are fleshy and store water.
Answer:
True
IV. Match the following :
| 1. | Petal | (a) | Opuntia |
| 2. | Fern | (b) | Chrysanthemum |
| 3. | Phylloclade | (c) | Attracts insect |
| 4. | Hooks | (d) | Spore |
| 5. | Sucker | (e) | Bignonia |
Answer:
1 – c; 2 – d; 3 – a; 4 – e; 5 – b
V. Very short answers.
1. Write two types of reproduction in plants.
Answer:
Sexual and Asexual Reproduction.
2. What are the two important parts of a flower?
Answer:
Androecium and Gynoecium.
3. Define – pollination.
Answer:
Transfer of pollen grains from the anther to stigma is called pollination.
4. What are the agents of pollination?
Answer:
Insects, wind, water, animals.
5. Give example for
(a) Corm
(b) Tuber
Answer:
- Corm-e.g Colocasia
- Tuber – e.g Potato.
6. What is tendril?
Answer:
- It is an elongated structure produced by the plant to help the plants to climb efficiently.
- g In pea, the terminal leaflets are modified into a tendril.
7. What are thorns?
Answer:
- Thoms are pointed and sharp structures formed in a plant.
- Leaves other parts may be modified into thorns.
- It helps the plant to safeguard itself from animals. Thoms may also help in climbing.
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