Gymnosperms Flashcards
1
Q
What evolved first xylem and phloem or seeds? How do we know?
A
Xylem and phloem. We know due to fossils. Archaeopteris was xylem/phloem, but no seeds.
2
Q
What is pollen?
A
Partly developed endosporic male gametophyte.
3
Q
What is an Ovule?
A
Megasporangium that is enclosed by one or more integuments.
4
Q
What 4 organisms are included within the group “Gymnosperms”?
A
- Conifers. 2. Cycads. 3. Ginkgo. 4. Gnetophytes.
5
Q
What did the integument evolve from?
A
Sterile branches that enclosed around the megasporangium.
