Chapter 38.1 Flashcards Preview

AP Biology > Chapter 38.1 > Flashcards

Flashcards in Chapter 38.1 Deck (29):
1

What are the parts of the flower? What's their purpose?

-Sepals: enclose floral bud
-Petals: attract pollinators
-Stamen: male gametophyte production
-Carpel: female gametophyte production

2

How many microsporangium are in 1 anther?

4

3

1 anther ---> 4 ______ -----> many _________ ---> ____ ________ per 1 of the last

1 anther to 4 microsporangium to many microsporocytes to 4 microspores per 1 of the last

4

1 microspore = ____ gametophytes

1

5

What does a male gametophyte consist of?

generative cell + tube cell

6

What does a pollen grain consist of?

Gametophyte + spore wall

7

Are microspores diploid or haploid?

Haploid

8

Are microsporocytes diploid or haploid?

Diploid

9

The generative cell produces how many sperm cells?

2

10

How many megaspores survive out of the 4 produced from 1 megasporocyte?

1

11

Is the single megaspore haploid or diploid?

Haploid

12

What does 1 ovule consist of?

Female gametophyte + 2 integuments

13

How many mitotic divisions does the megaspore perform?

3

14

After the megaspore performs 3 mitotic divisions, how many cells are in the gametophyte?

8

15

What is pollination?

Transfer of pollen from anther to stigma

16

What attracts the pollen tube to the micropyle?

GABA and the synergid cells

17

Which cells flank the egg?

Synergid cells

18

Where do the 2 sperm cells go to once it reaches the ovule

One goes to egg to form diploid zygote, other goes to polar nuclei to form triploid eventual endosperm

19

After double fertilization, what does each ovule become,? What does each ovary become?

Ovule: seed
Ovary: fruit protecting seeds

20

What 2 cells does the embryo split to?

Basal and terminal

21

What does the basal continue dividing into?

Chain called suspensor

22

What does the terminal cell continue dividing into?

Proembryo that attaches to suspensor

23

Where do cotyledons form?

On proembryo created from terminal cell

24

What is the seed coat formed from?

Integuments from ovary

25

In eudicot seeds, which embryonic axis is above teh cotyledons? Which is below?

-Epicotyl
-Hypocotyl

26

In eudicot seeds, what is the embryonic root called?

Radicle

27

What 2 sheathes enclose the embryo of grass seed?

Coleoptile (shoot); coleorhiza (root)

28

What is imbibition?

Seeds uptake of water due to low water pressure inside

29

What are the 4 types of fruit?

1. Simple: 1 fruit from 1 or more carpels
2. Aggregate: multiple fruits from multiple seperate carpels on 1 flower
3. Multiple: 1 fruit from carpels from flowers in inflorescence
4. Accessory: fruit from tissues other than ovary