Biology
11th Edition
ISBN: 9781259188138
Author: Peter H Raven, George B Johnson Professor, Kenneth A. Mason Dr. Ph.D., Jonathan Losos Dr., Susan Singer
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 30, Problem 6A
Identify which of the following statements is true.
a. Moss and lycophytes have leaves.
b. Leaves of lycophytes and pterophytes have different origins.
c. Leaves were a
d. Leaf polarity genes in Se la gin el I a support the hypothesis that leaves evolved one tune in all the land plants.
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Plants made the leap from water to land during the late Ordovician period (we think). In order to make it, various physical obstacles had to be overcome.
Choose one adaptation and explore it further. What evidence do we have of this change? Are there specific fossils of plants that exhibit it? How do we think it may have developed? Not all of these changes occurred at the exact same time. Was your chosen adaptation one of the first or late to the game?
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Chapter 30 Solutions
Biology
Ch. 30 - Which of the following plant structures is NOT...Ch. 30 - Which of the following genera most likely directly...Ch. 30 - Which of the following would NOT be found in a...Ch. 30 - Prob. 4UCh. 30 - Evolutionary innovations that increase desiccation...Ch. 30 - Which of the following statements about the...Ch. 30 - Compare what happens to a spore mother cell as it...Ch. 30 - How could a plant without roots obtain sufficient...Ch. 30 - A major innovation of land plants is embryo...Ch. 30 - In comparing the Selaginella and Physcomitrella...
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- The kingdom Plantae constitutes large and varied groups of organisms. There are more than 300,000 species of identified and cataloged plants. Using the geologic record, discuss and explain when and how plants colonized the land. Include the adaptations that enabled them to survive on land amid the harsh environmental conditions.arrow_forwardWhich of the following statements characterize the megaphyll line of evolution? A) They differ from microphylls by developing a single, unbranched vein rather than a branched vascular system.B) They are believed to have evolved from branching telomeres that flattened and developed photosynthetic tissue between the branches.C) They developed into leaves that can also be called lycophyllsD) They developed into the large leaves of the angiospermsarrow_forwardWhich of the following structures is not found in bryophytes? a. a cellulose cell wall b. chloroplast c. sporangium d. rootarrow_forward
- Monilophytes and seed plants both have megaphylls, as well as other traits not found in lycophytes. Explain this observation using the Figure in the picture and the concept of descent with modification.arrow_forwardLignin and vascular tissue first evolved in relatives of club moss, and some extinct species stood 40 meters (130 feet) high. Explain how the evolution of vascular tissues and lignin would have allowed a dramatic increase in plant height. How might being tall give one plant species a competitive advantage over another?arrow_forwardBIOMES & ADAPTIVE RADIATION Adaptive Radiation ven the type of biome these succulent plants are found in, identify 3 important stressors present in their environments. Now, describe how these pressures likely influenced the diversification of these plant lineages. Use one of the plant families listed above (and your representative species) to discuss as an example. (A well-developed paragraph is expected.)arrow_forward
- Which of the following lack true roots and leaves? * A. Bryophytes and whisk ferns B. Bryophytes C. Bryophytes, whisk ferns, lycopods and pterophytes D. Bryophytes, whisk ferns and lycopodsarrow_forwardDescribe two adaptations that are present in mosses, but not hornworts or liverworts, which reflect steps of evolution toward land plants.arrow_forwardHow may the following trends in plant evolution be adaptive to living on land? (a) dependence on water for fertilization ➝ no need for water as a transport medium (b) homospory ➝ heterosporyarrow_forward
- Rhizomes, tubers, corms, and stolons are examples of modified: A. leaves B. roots C. stems D. flowers E. bulbs Which phylum has very few surviving species, and are tropical and subtropical plants with stout, trunk-like stems, and compound leaves that resemble those of palms or tree ferns? A. Anthophyta B. Cycadophyta C. Coniferophyta D. Gnetophyta E. Pteridophyta True or False - Microphylls evolved from stem branches. ___________________ True Falsearrow_forwardOver the course of plant evolution, there has been an increasing dominance ofa. the gametophyte generation.b. C4 photosynthesis.c. angiosperms.d. the sporophyte generation.arrow_forwardA barrel cactus that is 60 cm tall and 30 cm in diameter has roots more than 3 m long. However, all the plant’s roots are found in the soil at a depth of 5 to15 cm. What possible adaptive value does such a shallow root system confer on a desert plant?arrow_forward
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