biology exam 2 Flashcards
What is the stigma’s purpose?
To catch pollen
Male part that creates sperm
Stamen
What is the another’s purpose?
To expel pollen
Example if fast cloning asexual plant
Kalanchoe
What flowe attracts flies?
Aurum Lilly
What does a staminate flower lack?
Female parts
What dies a pistillate flowe lack?
Male parts
What is a monoecious plant?
A plant that has both make and female parts, but they are separated. Corn is example
What is dioecious?
A plant that is only male or female.
What does a perfect flower have?
All flower parts
What us a zygote?
The combination if the male and female gametes
What dies the second spark in angiosperms do?
Fuses with other tells in the ovule to firm endosperm
What are the 4 mechanisms if seed dormancy?
Mechanical - scarification
Light - photo chrome
Temperature - stratification
Chemicals - leaching
What was dr deno’s hobby?
Figuring out why seeds germinate
What are the 5 main plant hormones?
Auxin Cytokinins Ethylene Absidic acid Gibberellins
What dies auxin do?
Tropic response and apical dominance.
What else can auxin do?
Cell expansion and fruit development
What plant part is most sensitive to auxin
The root
What do cytokinins do?
First found in herring Sperm and coconut milk
Cell division Delays senescence Suppressed root growth Regulates cell cycle Shapely apples
What are the three functions if ethylene
Fruit ripening
Leaf abscission
Flowering
What types if plant dies ethylene have a positive effect and one negative?
It has a positive affect on aquatic plant growth and negative in others
What are the 4 functions of abscissic acid?
Stomata I closure
Seed dormancy
Inhibits growth
What is a gibberellin and what’s it’s purpose?
A hormone that allows seed germination and can promote stem elongation
In what three ways do plants control hormones?
Combinations
Concentration
Varied synthesis
Control if cell division
Cytokinins and gibberellins
Stomatal closures
Abscissic acid
Stem elongation
Auxin and giberelliv acid
Gravitropism
Auxin
Ranunculalea
Buttercup herbaceous plants hepatuva Marigolds Goldenseal Larkspur Elderberry Honeysuckle
Purpose of phosphorus
ATP and stimulating root growth
.
Where is phosphorus
What is high p?
A root system that branches out?
What is low p?
Long dense root hairs
Mycorrhiza
Symbiotic root fungi relationship
Potassium
Stomata
Where is potasium?
Soil solution salts
Do monocots or dicots suck up nitrogen?
Monocots
What is the only monocot with nitrogen fixation?
Rice
Phytochrome
Red and far relight
Cryptochrome and phototropin
Blue light
What is the active form if red light?
Pfr
What is crypto chrome responsible for?
Circadian rhythm
Stem elongation
Leaf expansion and movements
Phototropism and phototropin
Directional growth response to light
What can break apical dominance?
Cytokinins
