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Tamil Nadu Board Class 7 Science Chapter 5 Reproduction and Modification in Plants

If you are looking for Tamil Nadu Board Class 7 Science Chapter 5 Reproduction and Modification in Plants then you are at the right place. Here we are providing solutions as well as additional QA / Important Notes.

 

[I] Choose the appropriate answer.

 

Vegetative propagation by leaves takes place in

  • Bryophyllum
  • Virus
  • Fungi
  • Bacteria

 

Asexual reproduction in yeast is

  • Spore formation
  • Pollination
  • Fragmentation
  • Budding

 

Reproductive part of a plant is

  • Root
  • Stem
  • Leaf
  • Flower

 

Pollinators are

  • Wind
  • Water
  • Insect
  • All the above

 

Climbing roots are seen in

  • Betel
  • Black pepper
  • Both of them
  • None of them

 

[II] Fill in the blanks.

  1. The male reproductive part of a flower is___________[androecium]
  2. ______is the basal swollen part of the gynoecium.[Ovary]
  3. After fertilization the ovule becomes__________[seed]
  4. Breathing roots are seen in _________plants.[mangrove]
  5. Onion and garlic are example for ___________[bulbs]

 

[III] State true or false. If false, correct the statement.

  1. A complete flower has four whorls.[True]
  2. The transfer of pollen to the stigma is known as pollination.[True]
  3. Conical shaped root is carrot.[True]
  4. Ginger is an underground root.[False – it is underground stem]
  5. Leaves of Aloe vera are fleshy and store water.[True]

 

[IV] Match the following

  • Petal – Opuntia
  • Fern – Chrysanthemum
  • Phylloclade – Attracts insect
  • Hooks – Spore
  • Sucker – Bignonia

 

Match the following – Answers

  • Petal – Attracts insect
  • Fern – Spore
  • Phylloclade – Opuntia
  • Hooks – Bignonia
  • Sucker – Chrysanthemum

 

[V] Answer very briefly.

 

Write two types of reproduction in plants.

Sexual reproduction and asexual reproduction.

 

What are the two important parts of a flower?

Androecium (male reproductive part) and gynoecium (female reproductive part).

 

Define – Pollination.

Pollination is the transfer of pollen grains from the anther to the stigma of a flower.

 

What are the agents of pollination?

Wind, water, insects, and animals.

 

Give example for Corm and Tuber

Corm: Colocasia

Tuber: Potato

 

What is tendril?

A tendril is a modified leaf, stem, or petiole that helps a plant to climb by attaching to and winding around a support.

 

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