BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Chapter 29, Problem 5A
Summary Introduction
Introduction:
In previous days, the seedless plants covered the earth. The seedless vascular plants are divided in to: lycophyta (club mosses), pterophyta (Ferns, horsetails) and the whisk ferns.
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The following evolutionary trends are seen in the seedless land plants.
a. Gametophytes became photosynthetic.
b. A key innovation accompanying the appearance of pterophytes was the haplodiplontic life cycle.
c. The gametophyte generation became the dominant generation.
d. There is increased protection of the sporophyte generation in its early developmental stages.
Which 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 angiosperms
What traits do bryophytes and tracheophytes have in common? Check all that you think apply.A) they both undergo alternation of generationsB) they both have chlorophylls a and b.C) they both have an asexual life cycle stage.D) they both have multicellular gametangiaE) they both have apical meristems
Chapter 29 Solutions
BIOLOGY
Ch. 29.1 - Explain the relationship between the different...Ch. 29.1 - Prob. 2LOCh. 29.1 - Prob. 3LOCh. 29.1 - Prob. 4LOCh. 29.2 - Describe adaptations of bryophytes for life on...Ch. 29.3 - Prob. 1LOCh. 29.3 - Evalute the signification of roots, stems, and...Ch. 29.4 - Prob. 1LOCh. 29.4 - Prob. 2LOCh. 29.5 - Prob. 1LO
Ch. 29.5 - Prob. 2LOCh. 29 - Compare the amount of time that passed between the...Ch. 29 - Explain why tracheophytes may have had a selective...Ch. 29 - Which of the following plant structures is NOT...Ch. 29 - Which of the following genera most likely directly...Ch. 29 - Which of the following would NOT be found in a...Ch. 29 - Prob. 4UCh. 29 - Evolutionary innovations that increase desiccation...Ch. 29 - Which of the following statements about the...Ch. 29 - Compare what happens to a spore mother cell as it...Ch. 29 - How could a plant without roots obtain sufficient...Ch. 29 - A major innovation of land plants is embryo...Ch. 29 - In comparing the Selaginella and Physcomitrella...Ch. 29 - Prob. 5ACh. 29 - Identify which of the following statements is...Ch. 29 - You have access to the sequenced genomes for moss...Ch. 29 - Would you expect the sporophyte generation of a...Ch. 29 - Imagine hypothetical moss and fern trees, each 10...
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- Which of the following is not a characteristic of plants? (a) cuticle (b) unicellular gametangia (c) stomata (d) multicellular embryo (e) alternation of generationsarrow_forwardWhich of the following incorrectly pairs a sporophyte embryo with its food source? * A. Moss embryo-archegonium and gametophyte plant B. Fern embryo-female sporophyte surrounding archegonium C. Pine embryo-female gametophyte tissue in nucellus D. Corn embryo-3N endosperm tissue in seedarrow_forwardThere is an evolutionary trend for more basal plants to be gametophyte dominant, but more derived plants to be sporophyte dominant. Suggest one reason why there might have been an evolutionary advantage to spending more time in the sporophyte generation.arrow_forward
- Which two structures evolved though a series of changes in the reproductive biology among some heterosporous plants during the late Devonian period allowed spermatophytes (seed plants) to reduce or eliminate their dependence on water for gamete fertilization and development of the embryo and allowed them to colonize a much wider range of habitats?arrow_forwardThe structure of the fern sporangium shown promotes spore dispersal by a ‘catapult’ mechanism. What is the driving force involved? A. Increased pressure within the sporangium B. Opening of the sporangium mouth C. Elastic rebound D. Water evaporation from the annulusarrow_forwardSeed plants lack which of the following structure(s)? (a) ovules surrounded by integuments (b) microspores and megaspores (c) vascular tissues (d) a large, nutritionally independent sporophyte (e) a large, nutritionally independentgametophytearrow_forward
- Moving evolutionarily through plant groups, from the nonvascular plants to the flowering plants, the gametophyte generation becomes more Explain how this pattern coincides with early plants’ move from aquatic, or at least moist, to terrestrial habitats.arrow_forwardWhich of the following structures is not found in bryophytes? a. a cellulose cell wall b. chloroplast c. sporangium d. rootarrow_forwardExplain why seedless vascular plants are not considered to be fully successful terrestrial plants even though they are widespread throughout the planet and contain vascular tissues for transporting materials.arrow_forward
- 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.arrow_forwardWhat adaptation do seed plants have in addition to the seed that is not found in seedless plants? a. gametophytes b. vascular tissue c. pollen d. chlorophyllarrow_forwardIn bryophytes, eggs are fertilized in a chamber on the ________ and a zygote develops into a _______. a. sporophyte; gametophyte b. gametophyte; sporophyte c. sorus; conearrow_forward
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