Tag: flower and pollination

Questions Related to flower and pollination

Seeds are products of sexual reproduction because they

biology the flower importance of pollination flower: parts of a flower flower and pollination

  1. Give rise to new plants

  2. Have variability

  3. Are formed by fusion of gametes

  4. Are formed by fusion of pollen tube

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Correct Option: C
Explanation:

Double fertilization in angiosperms triggers the transformation of ovule into a seed. The zygote delvelops into an embryo. In double fertilization, one male gamete fuses with the egg to form the diploid zygote, the other male gamete fuses with the two polar nuclei to form the triploid primary endosperm nucleus.

So, the correct answer is 'Are formed by fusion of gametes'.

Residual persistent nucellus is known as

biology the flower importance of pollination flower: parts of a flower flower and pollination

  1. Perisperm

  2. Integument

  3. Pericarp

  4. None of the above

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Correct Option: A
Explanation:

A. The nucellus is generally used up during the development of embryo, but in some cases, it remains outside the endosperm in the form of a thin layer, called perisperm.

B. Integuments- These are outer covering of ovule which provide protection to the developing embryo.

C. Pericarp or fruit developed from wall of the ovary.

So, the correct answer is 'Perisperm'.

In cirus, adventives embryos are derived from _____________.

biology the flower importance of pollination flower: parts of a flower flower and pollination

  1. Integuments

  2. Nucellus

  3. Synergids

  4. Zygotic embryo

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Correct Option: A

From which cell of embryo, plumule is produced.

biology the flower importance of pollination flower: parts of a flower flower and pollination

  1. Apical octant

  2. Proembryo

  3. Hypophysis

  4. Micropylar octant

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Correct Option: A