Ch 30 Flashcards
What is a plant called when it produced 2 types of spores?
Hetrosporous
What is a Female spore called?
Megaspore
Where is a female spore produced?
megasporangia
What does the female spore develop into?
female gametotype
What is a male spore called?
Microspore
Where is a male spore produced?
Microsporangium
What are the parts of the Ovule?
Megaspore, sporewall, megasporangium, integument
what does the function of the integument?
it is a a layer of sporophyte tissue that protects the megasporagium
what is pollen considered and where does it develop?
It is considered the male gametotype and it develops from the microspore
What are some evolutionary advantages of seeds over spores? (5)
Embryo (seed) is protected by ovule they are in a dormant phase until there are favorable conditions Seeds contain a food supply for embryo Dispersal is enhanced due to animals Protected from drought and temperatures
What are some features of gymnosperm seeds? (2)
The ovule is not completely enclosed
they lack flowers and fruit
4 species of gymnosperms?
Coniferophyda
cycadophyda
genetophyda
ginkgophyta
4 features of conifers are?
Tough needle like leaves with a thick cuticle and recessed stomata
resin secrets to reflect insects and fungus
lack rigid cell types
thick bark adapted for cold temps and fires
5 Synapomorophies of angiosperm?
Flowers overy that encloses ovuel stigma where pollen germination takes place Double fertilization stamens with flower
What is the stigma and what does it do?
It is the female part that attracts pollen
