"Ferns" include many plants that have vascular tissue but not seeds. Ferns first arose 360 million years ago and many species are still alive today. "Angiosperms" include plants with seeds and flowers. Angiosperms arose about 275 million years ago and many species are still around today. A group of scientists found a large rock that had been displaced from the earth recently. They found it came from a layer of rock that was 200 million year old. What is true about the fossils they might find in this layer of rock? Pick the single best answer. They would not find ferns or angiosperms. They would find both ferns and angiosperm They would find ferns but not angiosperms They would find angiosperms, but not ferns.
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What major tissue type(s) do ferns have that moss do not? How does this help ferns adapt better to living on land? Ferns have vascular tissue, while moss does not. This helps ferns adapt better because xylem and phloem, the two types of vascular tissue, transport water, glucose, and nutrients throughout the plant. Despite the adaptation mentioned in question 4, why do ferns still need to live in a moist environment? Ferns need to live in a moist environment because their spores will germinate, or grow, into heart-shaped haploid gametophyte prothallia.
Sri K.
Answer the following questions relating to Ferns: 1. Are the spores produced by the fern sporophyte formed by meiosis or mitosis? 2. Do the spores belong to the gametophyte or sporophyte generation? 3. Are the gametes produced by mitosis or meiosis? 4. Are the archegonia and antheridia haploid or diploid? Think about which generation produces them. 5. Is the dominant generation for the fern the gametophyte or sporophyte? 6. Can you suggest any ecological role for ferns? Find the answer on the internet. 7. Which parts of the fern life cycle are haploid? 8. Which parts of the fern life cycle are diploid? 9. How could you determine that rhizomes are stems and not roots? 10. Where are the male and female structures located on the heart-shaped prothallus? Attached find a Dichotomous Key to the different Genera of Common Ferns. What is a Dichotomous Key? What is the purpose of a Dichotomous Key?
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