Ch 22 Flashcards Preview

Plant Biology > Ch 22 > Flashcards

Flashcards in Ch 22 Deck (17):
1

Seed

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

2

Seed coat

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

3

Embryo

protect zygote (egg+sperm)

4

Food reserves

nourishment

5

Seedling

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6

Mature Sporophyte

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7

Pollen cone (male strobilus)

simple cone with a single short unbranched axis that bears microsporophylls

8

Microsporangium

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9

Microspore

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10

Pollen grain (male gametophyte)

shed from the tree as pollen and carried in the wind

11

Sperm

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

12

Ovulate cone (female strobilus)

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13

Ovule

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14

Megasporangium

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

15

Megaspore

retained inside the megasporangium and grows into a large multinucleate megagametophyte

16

Female gametophyte with archegonium

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17

Egg

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