Botany Quiz on Ovules and Seeds
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Questions and Answers

Which statement regarding ovules and seeds is correct?

  • The hilum is a scar on the ovule.
  • Ovules develop into seeds after fertilization. (correct)
  • Ovules develop into seeds only before fertilization.
  • Nucellus is always absent in mature seeds.

Which condition correctly identifies a sterile stamen?

  • Epiphyllous stamen
  • Proper stamen
  • Staminode (correct)
  • Functional stamen

Root hairs primarily develop from which part of the root?

  • Root cap
  • Maturation zone
  • Region of meristematic activity
  • Elongation zone (correct)

Select the incorrect match of placentation.

<p>Basal placentation - Mustard (D)</p> Signup and view all the answers

Apocarpous condition is observed in which pair of plants?

<p>Lotus and rose (A)</p> Signup and view all the answers

What is the term for the arrangement of ovules on the placenta within the ovary?

<p>Placentation (D)</p> Signup and view all the answers

Identify the plant that does not bear flowers in an acropetal succession.

<p>Dianthus (B)</p> Signup and view all the answers

Which function is usually not associated with roots?

<p>Manufacturing of food (C)</p> Signup and view all the answers

Flashcards

What is placentation?

The arrangement of ovules on the placenta within the ovary.

How are seeds formed?

The development of seeds arises from fertilized ovules.

Explain the term 'staminode'.

A sterile stamen, also called a staminode, is a modified stamen that lacks an anther and doesn't produce pollen. This structure can be used for attraction of pollinators.

Where do root hairs develop?

Root hairs are tiny outgrowths from epidermal cells of the root, specifically in the elongation zone. These hairs increase the surface area for water and mineral absorption from the soil.

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What is an epiphyllous stamen?

When stamen is attached to the petal; it is called epiphyllous. This happens in some plants where the stamen is attached to the petal, usually for better accessibility to pollinators.

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What are apocarpous flowers?

Apocarpous condition is when the gynoecium (female reproductive part) is made up of separate, free carpels. For example, in Lotus and Mustard, each ovary is composed of a single carpel.

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What is acropetal succession?

Acropetal succession describes the formation of flowers in an upward direction, starting from the base of the inflorescence and progressing towards the apex. There are some exceptions like Dianthus, where flowers bloom in reverse order.

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What is the characteristic of a cymose inflorescence?

In cymose inflorescence, the growth of the main axis is limited because it terminates into a flower. This contrasts with racemose inflorescence where the main axis continues to grow indefinitely.

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