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Biology: 39 - Sexual Reproduction In Flowering Plants > Seed Formation > Flashcards

Seed Formation Flashcards

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1
Q

What part of the plant becomes the seed?

A

The fertilised ovule

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2
Q

What does the fertilised ovule become?

A

The seed

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3
Q

What becomes the wall of the seed?

A

The integuments - walls of the ovule

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4
Q

How do the integuments become the walls of the seed?

A

They dry up

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5
Q

What is the wall of the seed called?

A

The testa

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6
Q

What is the testa?

A

The wall of the seed

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7
Q

How does the zygote grow?

A

By mitosis

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8
Q

What is formed by the mitotic division of the zygote?

A

The embryo

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9
Q

What is the embryo also called?

A

The young plant

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10
Q

What does the embryo consist of?

2

A

The future root (radicle)

The future shoot (plumule)

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11
Q

What is the definition of a radicle?

A

The radicle is the part of the plant embryo that develops into a root

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12
Q

What is the definition of a plumule?

A

The plumule is the part of the plant embryo that develops into the shoot

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13
Q

What is the future root?

A

The radicle

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14
Q

What is the future shoot?

A

The plumule

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15
Q

Other than forming the future root and shoot, what does part of the embryo form?
(2)

A

Some of the embryo cells grow to form one or two leaves

These embryonic leaves are the seed leaves or cotyledons

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16
Q

What is the definition of a cotyledon?

A

A cotyledon is a seed leaf

17
Q

What are cotyledons also called?

2

A

Embryonic leaves

Seed leaves

18
Q

How many cotyledons do monocots have?

A

One

19
Q

How many cotyledons do dicots have?

A

Two

20
Q

What type of plant has one cotyledon?

A

Monocots

21
Q

What type of plant has two cotyledons?

A

Dicots

22
Q

What is the function of cotyledons?

A

They become swollen with stored food especially in dicots

23
Q

What happens to the endosperm nucleus during seed formation?

A

The endosperm nucleus divides repeatedly by mitosis to produce many endosperm cells (3n)

24
Q

What forms the endosperm cells (3n)?

A

The mitotic division of the endosperm nucleus

25
Q

What do the endosperm cells do?

A

These expand and absorb the nucellus

26
Q

What is the role of the endosperm?

A

It acts as a sperm cell

27
Q

What are the main foods stored by seeds in the endosperm?

3

A

Fats/oils

Protein

Starch

Biology: 39 - Sexual Reproduction In Flowering Plants (27 decks)

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