Mastering Plant Anatomy

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MagnificentConnemara4258
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10 Questions

What is the male reproductive whorl of a flower called?

Androecium

What is the individual member of the androecium called?

Stamen

How many anther lobes does a dithecous anther typically have?

Two

What is the term for the differentiation that arises when some hypodermal cells get transformed into archesporial cells?

Heterogenesity

What does the sporogenous cell form in the anther?

Sporogenous tissue

What happens to the upper three megaspores during megasporogenesis?

They abort

What is the fate of the functional megaspore in megasporogenesis?

It becomes the first cell of the female gametophyte

What is the composition of the egg apparatus in the female gametophyte?

One central haploid egg cell and two supporting haploid synergid cells

What is the total number of nuclei formed during the development of the female gametophyte?

Eight

Where does the functional megaspore remain during megasporogenesis?

Towards the centre of the nucellus

Study Notes

Male Reproductive Whorl

  • The male reproductive whorl of a flower is called the androecium.

Androecium

  • An individual member of the androecium is called a stamen.

Anther Structure

  • A dithecous anther typically has two anther lobes.

Sporogenous Cell Formation

  • Some hypodermal cells get transformed into archesporial cells, which is a differentiation called sporogenesis.
  • The sporogenous cell forms microspores in the anther.

Megasporogenesis

  • The upper three megaspores degenerate during megasporogenesis.
  • The functional megaspore develops into the female gametophyte.
  • The functional megaspore remains in the ovule during megasporogenesis.

Female Gametophyte

  • The composition of the egg apparatus in the female gametophyte includes one egg cell and two synergids.
  • A total of eight nuclei are formed during the development of the female gametophyte.

Test your knowledge of plant anatomy with this quiz on the male reproductive structures of flowers. Explore the parts of the androecium, including the stamen, filament, connective, and anther. Delve into the structure of the anther and its pollen sacs to deepen your understanding of plant reproduction.

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