Seed Formation Flashcards

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?

19
Q

How many cotyledons do dicots have?

20
Q

What type of plant has one cotyledon?

21
Q

What type of plant has two cotyledons?

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
What do the endosperm cells do?
These expand and absorb the nucellus
26
What is the role of the endosperm?
It acts as a sperm cell
27
What are the main foods stored by seeds in the endosperm? | 3
Fats/oils Protein Starch