25.2: Formative/Summative Questions
- Page ID
- 118061
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Formative Questions
- What new environmental stressors would an alga need to adapt to if it were to try to move onto land?
- Choose one of the stressors you mentioned above. Try to come up with a few ways that you could modify the alga to be adapted to that stressor (changes in specialized cells, changes in tissue composition and types of biomolecules present, changes in organ structure, etc…). Explain how these modifications would help the alga adapt to those conditions. Drawings or diagrams may help.
- When bryophytes evolved on land, they didn’t have to compete with other plants. What were the major selective pressures for the bryophytes?
- If seedless vascular plants evolved after bryophytes began to colonize terrestrial surfaces, this would indicate a new major selective pressure: competition. What features might enable a fern to outcompete a moss?
Summative Questions
- Describe three adaptations that bryophytes have specifically for life on land.
- Explain why bryophytes tend to be so small in stature and are often found growing close to a surface.
- How would you tell the difference between a leafy liverwort and moss? Describe at least two things you could look for.
- Describe three adaptations that seedless vascular plants (SVPs) have that allow them to compete with bryophytes.
- Commonly called spike mosses and club mosses, lycophytes aren’t truly mosses at all. How could you distinguish between a moss and a lycophyte?
- Compare and contrast the role of the gametophyte in bryophytes and SVPs.
- What are the advantages to having a branching sporophyte?
- Compare the life cycles of a moss and a fern - how is the alternation of generations seen in each organism?
Seed Plants
Formative Questions
- When you think of plants adapted to dry conditions, what comes to mind? What features do these plants have?
- Would a snowy environment be considered a dry environment for a plant? Why or why not?
- When you think of a flower, what characteristics come to mind?
- How might those characteristics relate to the function of a flower?
- When you think of a fruit, what characteristics come to mind?
- How might those characteristics relate to the function of a fruit?
Summative Questions
- What is pollen?
- Why was pollen an important adaptation for gymnosperms, considering the changing global conditions?
- What adaptations do gymnosperms share that allowed them to compete with SVPs?
- Describe the advantages provided by the adaptations you listed in the previous question and relate them to changes in global climate.
- How would you differentiate a fern and a cycad?
- In what climate(s) would you be most likely to find gymnosperms? Explain your answer.
- How could the coevolution of angiosperms and pollinators explain the vast radiation in species that angiosperms experienced?
- How does the structure of a vessel element relate to the ability of angiosperms to compete with gymnosperms?
- Where does meiosis occur in the flower?
- What is the function of a fruit?
- How could you distinguish between a fruit and a vegetable at the grocery store?
- In the diagram below, an apple blossom is developing into a fruit. Label all of the parts of fruit and flower anatomy that you can see. What type of fruit is this?
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Figure \(\PageIndex{1}\): Copy and Paste Caption here - What food sources does the embryo have before it opens its first leaves in the sunlight?
- Oaks and alders are both angiosperms that grow into trees. Oaks produce nuts with large seeds, while alders produce tiny samaras. In a year in the life of a black oak, it might grow 50 cm and produce 6500 nuts. In that same year, a red alder might grow 1-2 meters and produce around 5 million samaras. What are the tradeoffs between these two very different strategies? How might they relate to the different life histories of oaks and alders?
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Contributors and Attributions