BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
10th Edition
ISBN: 9781305967359
Author: STARR
Publisher: CENGAGE L
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Chapter 21, Problem 3SA
In
| a. sporophyte; gametophyte |
| b. gametophyte; sporophyte |
| c. sorus; cone |
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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.
Why must bryophytes inhabit damp environment? It is because *
A. their sporophyte generation is dependent on the gametophyte.
B. their sperm must swim to reach the egg.
C. they do not have woody tissues.
D. females can produce only one archegonium.
Plants developing in dry conditions are:
A.
xerophytes
B.
mesophytes
C.
lithophytes
D.
hydrophytes
Chapter 21 Solutions
BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
Ch. 21 - The first plants were_________. a. ferns c....Ch. 21 - Which of the following statements is false? a....Ch. 21 - In bryophytes, eggs are fertilized in a chamber on...Ch. 21 - Prob. 4SACh. 21 - Coal consists primarily of compressed remains of...Ch. 21 - Prob. 6SACh. 21 - Prob. 7SACh. 21 - Prob. 8SACh. 21 - Only angiosperms produce_______. a. pollen c....Ch. 21 - The _______do not have xylem or phloem. a. mosses...
Ch. 21 - Prob. 11SACh. 21 - Prob. 12SACh. 21 - Prob. 13SACh. 21 - Prob. 14SACh. 21 - Prob. 15SACh. 21 - Early botanists admired ferns but found their life...Ch. 21 - In animals, meiosis of germ cells produces...Ch. 21 - In most plants the largest, longest-lived body is...Ch. 21 - Consider a cherry pit, which is a seed with a...Ch. 21 - Suppose you wanted to make a science fiction film...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- The bryophytes (a) include mosses, liverworts, and hornworts (b) include whisk ferns, horsetails, and club mosses (c) are small plants that lack a vascular system (d) a and c (e) b and carrow_forwardThe land plants are probably descendants of which of these groups? a. green algae b. red algae c. brown algae d. angiospermsarrow_forwardWhich 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_forward
- Moss is an example of which type of plant? a. haplontic plant b. vascular plant c. diplontic plant d. seed plantarrow_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_forwardThe waxy layer that covers aerial parts of plants is the (a) cuticle (b) archegonium (c) protonema (d) stoma (e) thallusarrow_forward
- Which of the following statements is false? a. Ferns produce seeds inside sori. b. Conifers do not produce fruits. c. Both gymnosperms and angiosperms produce pollen. d. Only angiosperms produce flowersarrow_forwardWhich of the following is not a characteristic of plants? (a) cuticle (b) unicellular gametangia (c) stomata (d) multicellular embryo (e) alternation of generationsarrow_forwardA botanist travels to an area that has experienced a long, severe drought. While examining the bryophytes in the area, he notices that many are in the same life-cycle stage. Which life-cycle stage should be the most common? a. zygote b. gametophyte c. sporophyte d. archegoniumarrow_forward
- Which reproductive structures would be found in a seedless, nonvascular plant? A. ovules B. archegonia C. cones D. megasporangiaarrow_forwardWhich of the following characteristics of plants is absent intheir closest relatives, the charophyte algae?(A) chlorophyll b(B) cellulose in cell walls(C) sexual reproduction(D) alternation of multicellular generationsarrow_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_forward
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