Characteristics of Gymnosperms
Unlike the Monilophyta, this adaptation allows me to grow a wider base meaning I can get very tall. I also contain these special cell types in my secondary xylem and phloem.
Secondary growth. Traichieds (X) Sieve cells (P)
I am ___ like in appearance
Fern
Like the Cycadophyta, I am _____ and produce microstrobili that look like anthers and ovules paired at the tips of my branches.
Dioecious.
Unlike all other gymnosperms, I am _____.
Monoecious, my megastrobili and microstrobili are produced on the same plant.
I have the following THREE 'super derived" characteristics, you'd think I was an angiosperm!
1. Vessel elements
2. Flower like structures
3. Double fertilization
This adaptation allows me to be drought resistant due to the following 4 features...
Xerophytic leaves...
1. thick cuticle
2. sunken stomata
3. thick hypodermis
4. resin canals
I am ____ meaning 'two houses'
Dioecious, male and female cones produced on different plants
Unlike the Cycadophyta I am pollinated by ___, and my sperm is flagellated.
Like the Ginkophyta, I am wind pollinated, however my sperm is ____.
Wind, Insect.
I produce ____ containing stored food leftover from the ____
Seeds, Megasporangium
Flagellated.
After fertilization the integument becomes the ______, and the ______ becomes the nucellus,
Seed coat, megasporangium.
My pollen is winged and contains these three cell types...
Tube cell: Grows pollen tube
Generative cell: Makes sperm
Prothalial cells: "left over"
Like the angiosperms, my sperm _____.
Lack flagella.
My pollen is winged meant for _____
Wind disperal
In the seed all the tissues are _____, except the ____ which isn't.
Diploid, megagametophyte
The megaspore mother cell contained within the _____ of the ovulate cone, goes through meiosis to produce 4 ______.
Megasporangium, Megaspores.
What kind of life cycle does Coniferophyta display?
Sporic meiosis, alternation of generations.
The _______ located on the pollen cones contain the _______, which produces microspores.
Microsporangium, microspore mother cell.