Ch 22 Flashcards

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1
Q

Seed

A

borne in a cone not a fruit; nourishment of the embryo, dispersal to a new location, and dormancy during unfavorable conditions

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2
Q

Seed coat

A

the protective layer on a seed; the seed coat develops from one or both integuments

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3
Q

Embryo

A

protect zygote (egg+sperm)

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4
Q

Food reserves

A

nourishment

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5
Q

Seedling

A

.

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6
Q

Mature Sporophyte

A

.

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7
Q

Pollen cone (male strobilus)

A

simple cone with a single short unbranched axis that bears microsporophylls

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8
Q

Microsporangium

A

.

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9
Q

Microspore

A

.

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10
Q

Pollen grain (male gametophyte)

A

shed from the tree as pollen and carried in the wind

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11
Q

Sperm

A

pollen tube delivers the sperm cells to the archegonia; sperm cells motile

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12
Q

Ovulate cone (female strobilus)

A

.

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13
Q

Ovule

A

.

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14
Q

Megasporangium

A

inside each megasporangium is a single large megaspore mother cell that undergoes meiosis which results in one surviving megaspore and 3 that die

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15
Q

Megaspore

A

retained inside the megasporangium and grows into a large multinucleate megagametophyte

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16
Q

Female gametophyte with archegonium

A

.

17
Q

Egg

A

gigantic cells loaded with carbohydrate and protein; egg nucleus is haploid and large (swollen)