| The multicellular gametophytes of mosses are haploid. |
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| 2. | Which of the vascular plants have swimming sperm and rely on liquid water in the environment to achieve fertilization? |
| | ferns, horsetails, and gymnosperms | | gymnosperms and angiosperms | | mosses and gymnosperms | | ferns, horsetails, and mosses | |
| 3. | Which of the four major groups of gymnosperms currently has only a single species? |
| | conifers | | cycads | | gnetophytes | | ginkgos | |
| 4. | A botanist discovers a new seed-forming plant. She notices that this plant lacks a vascular cambium and has fibrous roots. What would be the MOST likely placement of this plant? (Select all that apply.) |
| | among conifers | | among monocots | | among angiosperms | | among eudicots | | among cycads | |
| 5. | What structures were present in the earliest vascular plants? (Select all that apply.) |
| | multi-veined leaves | | extensive root systems | | pigments to protect from UV-radiation | | cuticles | | stomata | |
| 6. | The gymnosperm gnetophytes are known to have diversified alongside early angiosperms in Cretaceous tropical forests. The presence of what general features may account for the fact that tropical forests are dominated (in terms of both ecological importance and diversity) by eudicots and monocots and not gnetophytes today - i.e. which things give angiosperms an advantage? (Select all that apply.) |
| | xylem with vessel elements | | tightly coevolved reproductive structures and animal pollinators | | fruits dispersed by animals | | pollen | | swimming sperm | |
| The multicellular gametophytes of mosses are haploid. |
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1. True. In liverworts dominant haploid generation is found whereas in case of vascular plants the dominant generation is diploid sporophyte.
2. Option D is the correct answer. Seedless vascular plants have motile sperms and this is the reason why these plants are found in moist environment.
3. Option D is the correct answer. Ginkgo has one surviving species. It is also known as living fossil.
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