BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Chapter 30, Problem 1S
You haw been hired as a research assistant to investigate it origins of the
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What can you say about an early interpretation or hypothesis that the gnetophytes are probably the sister lineage of the angiosperms? Do you agree or not?
Working in the field, you discover a fossil of a previously undescribed plant species.The specimen is small and may not be complete; the parts you have do not include floral organs. what sort of observation(evidence) would you nrrd in order to classify the fossilas a vasucular plant with reasonable accuracy?What evidence would you need to distinguis between an angiosperm and gymnosperm?
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Describe what the early angiosperm may have been like with regard to flowers, body, ecołogy, wood and pollen. For each of the characters, what living angiosperms still have those characters? In what ways have those changed in certain lines of evolution?
Chapter 30 Solutions
BIOLOGY
Ch. 30.1 - List the evolutionary advantages of seeds.Ch. 30.1 - Distinguish between pollen and sperm in seed...Ch. 30.2 - Prob. 1LOCh. 30.2 - Prob. 2LOCh. 30.3 - Prob. 1LOCh. 30.3 - Prob. 2LOCh. 30.3 - Prob. 3LOCh. 30.4 - Describe four ways in which seeds help to ensure...Ch. 30.4 - List environmental conditions that can lead to...Ch. 30.5 - Prob. 1LO
Ch. 30.5 - Prob. 2LOCh. 30 - Using the graph in figure 30.13, calculate the...Ch. 30 - Prob. 1IQCh. 30 - Prob. 2IQCh. 30 - Prob. 3IQCh. 30 - Prob. 4IQCh. 30 - The lack of seeds is a characteristic of all a....Ch. 30 - Prob. 2UCh. 30 - Which of the following gymnosperms possesses a...Ch. 30 - In a pine tree, the microspores and megaspores are...Ch. 30 - Which of the following terms is NOT associated...Ch. 30 - Which of the following potentially represents the...Ch. 30 - Prob. 7UCh. 30 - Prob. 8UCh. 30 - The pericarp is the a. ovary wall. b. developing...Ch. 30 - Reproduction in angiospenns can occur more quickly...Ch. 30 - In double fertilization, one sperm produces a...Ch. 30 - Apply your understanding of angiosperms to...Ch. 30 - Comparing stems of two plant specimens under the...Ch. 30 - Prob. 5ACh. 30 - Fruits are complex organs that are specialized for...Ch. 30 - You haw been hired as a research assistant to...Ch. 30 - Prob. 2SCh. 30 - The relationship between flowering plants and...Ch. 30 - Prob. 4S
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- Which of the following traits characterizes gymnosperms? a. The plants carry exposed seeds on modified leaves. b. Reproductive structures are located in a flower. c. After fertilization, the ovary thickens and forms a fruit. d. The gametophyte is longest phase of the life cycle.arrow_forwardWhat similar features do gymnosperms and angiosperms possess thatdiffer from other modern vascular plants?a. Gymnosperms and angiosperms both produce flagellatesperm.b. Gymnosperms and angiosperms both produce flowers.c. Gymnosperms and angiosperms both produce tracheids, but notvessels, in their vascular tissues.d. Gymnosperms and angiosperms both produce fruits.e. none of the abovearrow_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_forward
- Which of the following adaptations possibly explain(s) why angiosperms are more diverse than gymnosperms on planet Earth: Group of answer choices Seeds Seeds AND Fruits and Flowers AND Pollen tube Fruits and Flowers Fruits and Flowers AND Pollen tube Pollen tubearrow_forwardWhich angiosperm lineage includes the most species?a. magnoliids c. monocotsb. eudicots d. water liliesarrow_forwardWhat do you think is the evolutionary advantage(s) of heterospory over homospory? Do you think it helped the angiosperms to colonize the land?arrow_forward
- For those who aren't scientists, there is disappointment when it's learned that scientists don't have all the answers to our questions. (Personally, it took awhile for me to be comfortable with this, and now I love it!). After reading the links and article, what are at least five unanswered questions that pertain to angiosperm evolution and diversification.arrow_forwardWhat are fruits? What can they look like? What are their function? What were early angiosperms like? Where and when fif they likely diverage from?arrow_forwardWhat evolutionary advantages do seed provide over spores? What was early gymnosperm ecology like? What ecological role did gymnosperms perform as the dominant terrestrial plant type 250 million years ago? what were did angiosperms begin to replace gymnosperms as the new dominant plant type in terrestrial ecosystemsarrow_forward
- Which of these is mismatched? charophyte - hypha angiosperm - flower mushroom - fruiting body gymnosperm - seed lycophyte - microphyllarrow_forwardWhat separates the gymnosperms from other seed plants?a. a vascular systemb. wind dispersion of pollenc. ovules not completely covered by the sporophyte at the time of pollinationd. fruits and flowersarrow_forwardThe simplest group of modern land plants listed below is A. gymnosperms B. angiosperms C. cycads D. fernsarrow_forward
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