Class 9 Concise Biology Selina Chapter 6 Seeds - MCQs
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Questions and Answers

Which part of the plant is correctly matched with its characteristic?

  • Bean seed → endosperm
  • Wheat grain → exalbuminous
  • Maize grain → coleoptile (correct)
  • Mango seed → aleurone layer

Why do seeds sown very deep in the soil fail to germinate?

  • They cannot exert enough force to push the soil upward. (correct)
  • They get too much water.
  • They do not get enough sunlight.
  • They do not get enough oxygen.

What grows to form fruit after fertilization?

  • Ovary (correct)
  • Ovule
  • Embryo
  • Zygote

Which of the following is the largest seed?

<p>Double coconut (C)</p> Signup and view all the answers

5

<p>Hilum (C)</p> Signup and view all the answers

What is the protective sheath enclosing the plumule in monocots like maize called?

<p>coleoptile</p> Signup and view all the answers

Why do seeds sown very deep in the soil fail to germinate?

<p>Seeds sown very deep in the soil fail to germinate because of two main reasons: no proper supply of oxygen (for respiration) and insufficient pushing force in the embryonic parts (hypocotyl and epicotyl) to break through the upper layers of soil.</p> Signup and view all the answers

What is the largest seed among the options given?

<p>Double coconut</p> Signup and view all the answers

What is the distinct whitish oval scar on the concave side of the seed termed as?

<p>Hilum</p> Signup and view all the answers

What plant part grows to form fruit after fertilization?

<p>Ovary</p> Signup and view all the answers

Flashcards

Maize grain

A type of grain with a protective sheath called coleoptile.

Coleoptile

A protective covering that encloses the plumule in monocot seeds like maize.

Ovary

The part of a flower that develops into fruit after fertilization.

Double coconut

The largest seed in the plant kingdom, known for its size and unique shape.

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Hilum

The distinct whitish oval scar on the seed's concave side, marking the seed's attachment point.

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Deeply sown seeds

Seeds sown too deep in soil often fail to germinate due to lack of oxygen and insufficient force to break through soil.

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Germination failure

A condition where seeds do not sprout due to environmental factors like soil depth.

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Seed respiration

The process by which seeds take in oxygen for growth, essential for germination.

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Plumule

The young shoot of a seed, which eventually becomes the stem and leaves of the plant.

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Hypocotyl and epicotyl

The embryonic parts of a seed that help in breaking through the soil during germination.

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Study Notes

Plant Structure and Seeds

  • The radicle is correctly matched with its characteristic of growing downward into the soil.
  • Seeds sown very deep in the soil fail to germinate because they lack sufficient light for growth.
  • The ovary grows to form fruit after fertilization.
  • The coco de mer is the largest seed.
  • The protective sheath enclosing the plumule in monocots like maize is called the coleoptile.
  • Seeds sown very deep in the soil fail to germinate due to insufficient oxygen and light.
  • The coco de mer is the largest seed among the options given.
  • The distinct whitish oval scar on the concave side of the seed is termed as the hilum.
  • The ovary grows to form fruit after fertilization.

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Test your knowledge of plant seeds with these multiple-choice questions from Chapter 6 Seeds - Structure and Germination of Class 9 Concise Biology Selina. Identify correct plant part characteristics, understand seed germination challenges, and more.

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