Sexual Reproduction in Flowering Plants

The outermost and innermost wall layers of microsporangium in an anther are respectively

• Endothecium and tapetum
• Epidermis and endothecium
• Epidermis and middle layer
• Epidermis and tapetum

During microsporogenesis, meiosis occurs in:

• Endothecium
• Microspore mother cells
• Microspore tetrads
• Pollen grains

Tags

NGSS.HS-LS3-2

In an embryo sac, the cells that degenerate after fertilisation are:

• Synergids and primary endosperm cell
• Synergids and antipodals
• Antipodals and primary endosperm cell
• Egg and antipodals

Assertion : Pollen mother cells (PMCs) are the first male gametophytic cells. Reason : Each PMC gives rise to two pollens

• A) If both Assertion and Reason are true and Reason is the correct explanation of Assertion.

• B) If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.

• C) If Assertion is true but Reason is false.

• D) If both Assertion and Reason are false.

How many microspore mother cell are required to produce 1000 microspores/pollen grains?

• 100
• 150
• 200
• 250

Embryo sac is to ovule as ______ is to an anther.

Starting from the innermost part, the correct sequence of parts in an ovule are:

• egg, nucellus, embryo sac, integument
• egg, embryo sac, nucellus, integument
• embryo sac, nucellus, integument, egg
• egg, integument, embryo sac, nucellus

The obturator in Euphorbia develops from

• Funicle

• Placenta

• Outer integument

• Inner integument

Sporopollenin is present in which part of the a pollen?

• Intine
• Germ Pore
• Exine
• Vegetative cell

During fertilisation generative nucleus divides forming

• 1 male gamete
• 2 male gametes
• 1 female gamete
• 2 female gametes

Tags

NGSS.HS-LS3-2