Chapter 38.1

Question 1

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

Answer 1

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

Question 2

How many microsporangium are in 1 anther?

Answer 2

4

Question 3

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

Answer 3

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

Question 4

1 microspore = ____ gametophytes

Answer 4

1

Question 5

What does a male gametophyte consist of?

Answer 5

generative cell + tube cell

Question 6

What does a pollen grain consist of?

Answer 6

Gametophyte + spore wall

Question 7

Are microspores diploid or haploid?

Answer 7

Haploid

Question 8

Are microsporocytes diploid or haploid?

Answer 8

Diploid

Question 9

The generative cell produces how many sperm cells?

Answer 9

2

Question 10

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

Answer 10

1

Question 11

Is the single megaspore haploid or diploid?

Answer 11

Haploid

Question 12

What does 1 ovule consist of?

Answer 12

Female gametophyte + 2 integuments

Question 13

How many mitotic divisions does the megaspore perform?

Answer 13

3

Question 14

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

Answer 14

8

Question 15

What is pollination?

Answer 15

Transfer of pollen from anther to stigma

Question 16

What attracts the pollen tube to the micropyle?

Answer 16

GABA and the synergid cells

Question 17

Which cells flank the egg?

Answer 17

Synergid cells

Question 18

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

Answer 18

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

Question 19

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

Answer 19

Ovule: seed
Ovary: fruit protecting seeds

Question 20

What 2 cells does the embryo split to?

Answer 20

Basal and terminal

Question 21

What does the basal continue dividing into?

Answer 21

Chain called suspensor

Question 22

What does the terminal cell continue dividing into?

Answer 22

Proembryo that attaches to suspensor

Question 23

Where do cotyledons form?

Answer 23

On proembryo created from terminal cell

Question 24

What is the seed coat formed from?

Answer 24

Integuments from ovary

Question 25

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

Answer 25

• Epicotyl

- Hypocotyl

Question 26

In eudicot seeds, what is the embryonic root called?

Answer 26

Radicle

Question 27

What 2 sheathes enclose the embryo of grass seed?

Answer 27

Coleoptile (shoot); coleorhiza (root)

Question 28

What is imbibition?

Answer 28

Seeds uptake of water due to low water pressure inside

Question 29

What are the 4 types of fruit?

Answer 29

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