Chapter 38.1 Flashcards
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
How many microsporangium are in 1 anther?
4
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
1 microspore = ____ gametophytes
1
What does a male gametophyte consist of?
generative cell + tube cell
What does a pollen grain consist of?
Gametophyte + spore wall
Are microspores diploid or haploid?
Haploid
Are microsporocytes diploid or haploid?
Diploid
The generative cell produces how many sperm cells?
2
How many megaspores survive out of the 4 produced from 1 megasporocyte?
1
Is the single megaspore haploid or diploid?
Haploid
What does 1 ovule consist of?
Female gametophyte + 2 integuments
How many mitotic divisions does the megaspore perform?
3
After the megaspore performs 3 mitotic divisions, how many cells are in the gametophyte?
8
What is pollination?
Transfer of pollen from anther to stigma
What attracts the pollen tube to the micropyle?
GABA and the synergid cells
Which cells flank the egg?
Synergid cells
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
After double fertilization, what does each ovule become,? What does each ovary become?
Ovule: seed
Ovary: fruit protecting seeds
What 2 cells does the embryo split to?
Basal and terminal
What does the basal continue dividing into?
Chain called suspensor
What does the terminal cell continue dividing into?
Proembryo that attaches to suspensor
Where do cotyledons form?
On proembryo created from terminal cell
What is the seed coat formed from?
Integuments from ovary
In eudicot seeds, which embryonic axis is above teh cotyledons? Which is below?
- Epicotyl
- Hypocotyl
In eudicot seeds, what is the embryonic root called?
Radicle
What 2 sheathes enclose the embryo of grass seed?
Coleoptile (shoot); coleorhiza (root)
What is imbibition?
Seeds uptake of water due to low water pressure inside
What are the 4 types of fruit?
- Simple: 1 fruit from 1 or more carpels
- Aggregate: multiple fruits from multiple seperate carpels on 1 flower
- Multiple: 1 fruit from carpels from flowers in inflorescence
- Accessory: fruit from tissues other than ovary
