Pollination Flashcards

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1
Q

What do anthers have?

A

Lines along which the anther will split

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2
Q

What do anthers in a young flower contain?

A

Pollen sacs with developing pollen grains

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3
Q

How are pollen grains formed?

A

When cells around the edge of the pollen sac divide

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4
Q

How is pollen released?

A

The anther splits open and releases pollen

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5
Q

Why do pollen grains have hard coats?

A

To survive harsh conditions. Coat protects the male gametes contained inside as the pollen grain is transported

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6
Q

How does fertilisation in plants happen?

A

The nucleus of the pollen grain fuses with the nucleus of the ovule

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7
Q

What happens after pollination?

A

If the polen grain landed on the right stigma, it begins to grow a pollen tube

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8
Q

How does the pollen tube grow through the style and stigma?

A

It secretes an enzyme to digest a path through the style

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9
Q

What is a micropyle?

A

A small hole in the ovule

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10
Q

What happens once the pollen tube grows through the micropyle into the ovule?

A

The pollen nucleus travels along the tube into the ovule, where it fuses with the ovule nucleus.ONE POLLEN CAN FERTILISE JUST ONE OVULE

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