Question
This botanical division was historically thought to be a sister group to angiosperms but was reclassified based on molecular genetic evidence. For 10 points each:
[10h] Name this division of gymnosperms. It has three relict families with one extant genus each, one of which contains the single species Welwitschia mirabilis.
ANSWER: Gnetophyta [or Gnetophytes]
[10m] Gnetophytes were thought to be related to angiosperms due to having these vascular cells. While angiosperm xylem contains these cells in addition to tracheids, non-gnetophyte gymnosperm xylem contains only tracheids.
ANSWER: vessel elements [or vessel members; prompt on vessels]
[10e] Gnetophytes are thought to be a subset of this group of plants, according to the gnepine hypothesis. All extant organisms in this division of cone-bearing gymnosperms are perennial woody plants.
ANSWER: conifers [or Coniferae or Coniferophyta or Pinophyta]
<Science - Biology>
Summary
| 2024 ARGOS @ Chicago | 11/23/2024 | Y | 1 | 0.00 | 0% | 0% | 0% |
| 2024 ARGOS @ Stanford | 02/22/2025 | Y | 2 | 10.00 | 50% | 50% | 0% |
Data
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