Biological Science (7th Edition)
7th Edition
ISBN: 9780134678320
Author: Scott Freeman, Kim Quillin, Lizabeth Allison, Michael Black, Greg Podgorski, Emily Taylor, Jeff Carmichael
Publisher: PEARSON
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Textbook Question
Chapter 28, Problem 5TYU
What does it mean to say that a life cycle is gametophyte dominant versus sporophyte dominant?
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What are the five key traits that appear in nearly all plants but are absent in charophytes? If these traits are absent in charophytes what does that make them? What is a gametophyte? What is sporophyte? Are they haploid or diploid? What do they produce?
Which of the following comparisons between the moss life cycle and fern life cycle are correct? A) Mosses have flagellated sperm that need water to reach the female gamete, while the sperm of ferns are unflagellated and are not dependent on water.B) The sporophyte generation is smaller than the gametophyte generation in mosses, but the sporophyte generation is much larger than the gametophyte generation in ferns.C) The spores are produced in capsules on stalks in mosses but in small structures called sori on the underside of leaves in ferns.D) The gametes are produced in gametangia in mosses but in specialized structures on the underside of leaves in ferns.E) Both kinds of plants depend on wind for dispersal of spores.
The gametophyte of Pteridophytes is inconspicuous in comparison to the mosses. They
are also commonly monecious (single house for male and female gamete production). The
photo below shows a whole mount (w.m.) of a fern gametophyte at 4x.
Make a sketch of the specimen and label the following structures: archegonium,
antheridium, mature gametophyte (prothallus), rhizoids
AMooD ok Dr
Chapter 28 Solutions
Biological Science (7th Edition)
Ch. 28 - What important role does lignin play in vascular...Ch. 28 - Prob. 2TYKCh. 28 - What is a pollen grain? a. male gametophyte b....Ch. 28 - 5. What does it mean to say that a life cycle is...Ch. 28 - 6. SOCIETY Soils, water, and the atmosphere are...Ch. 28 - Prob. 7TYUCh. 28 - Explain the difference between homosporous and...Ch. 28 - Angiosperms such as grasses, oaks, and maples are...Ch. 28 - PROCESS OF SCIENCE You have been hired as a field...Ch. 28 - Is long-distance sex possible in mosses?
Moss...
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- The gametophyte of Pteridophytes is inconspicuous in comparison to the mosses. They are also commonly monecious (single house for male and female gamete production). The photo below shows a whole mount (w.m.) of a fern gametophyte at 4x. Make a sketch of the specimen and label the following structures: archegonium, antheridium, mature gametophyte (prothallus), rhizoids MacBarrow_forwardWhich of the following processes occurs in a plant's sexual life cycle? sporophytes produce gametes by meiosis sporophytes produce gametes by mitosis gametophytes produce gametes by meiosis gametophytes produce gametes by mitosisarrow_forwardThe gametophyte of Pteridophytes is inconspicuous in comparison to the mosses. They are also commonly monecious (single house for male and female gamete production). The photo below shows a whole mount (w.m.) of a fern gametophyte at 4x. Make a sketch of the specimen and label the following structures: archegonium, antheridium, mature gametophyte (prothallus), rhizoidsarrow_forward
- Of the four parts of alteration of generations cycle (embryo/sporophyte, spore, gametophyte, gamete), which one does pollen belong to?arrow_forwardA B C D G E F H a) On the diagram, which labeled structure represents the mature male gametophyte? I b) Which labeled structure represents the female megasporangium, prior to the production of spores? c) On the diagram, which labeled structure represents the immature male gametophyte? F d) Which labeled structure represents the mature female gametophyte? Jarrow_forwardWhich is the dominant part of the Lycopodium life cycle, the sporophyte or gametophyte?arrow_forward
- What is a gametophyte? How many different types of gametophytes are there in a plant life cycle? What do they look like (as shown)? Do the sporophytes and gametophytes of seed plants ever look like each other?arrow_forwardThe male gametophyte of the moss looks identical to the female from the naked eye, but the photo below (I.s. at 4x and then at 40 x) shows that the tip contains the structures where male gametes are produced.arrow_forwardOne of the genera of Lycophytes are the Selaginellaceae. Like other Lycophytes, Selaginellids bear their spores in a strobilus but they have an unusual strobilus. Which answer below best describes this difference? O their spores are always diploid O they are gaemtophyte dominant O their spores are heterosporous O their strobilus is dependnent upon the female gametophyte like mosses APR 25 étv MacBook Pro G Search or type URL @ #3 % %24arrow_forward
- In general where is thesporophyte positioned inrelation to the gametophyte inbryophytes? How does thesporophyte obtain nutrients?arrow_forwardWhich of the following lettered structures is the female gametophyte?arrow_forwardIf ferns produce spores, are they a sporophyte or agametophyte? Are they haploid or diploi Describe two differences between a fern sporophyte and a moss sporophyte. Are fern spores haploid or diploid? Are the spores produced by meiosis or mitosis? Where are the spores produced?arrow_forward
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