Gymnosperms Flashcards Preview

Botany 130 > Gymnosperms > Flashcards

Flashcards in Gymnosperms Deck (5)
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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
  1. Conifers. 2. Cycads. 3. Ginkgo. 4. Gnetophytes.
5
Q

What did the integument evolve from?

A

Sterile branches that enclosed around the megasporangium.