BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
10th Edition
ISBN: 9781305967359
Author: STARR
Publisher: CENGAGE L
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Textbook Question
Chapter 21, Problem 3SA
In
| a. sporophyte; gametophyte |
| b. gametophyte; sporophyte |
| c. sorus; cone |
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Bryophytes alone have a relatively large_____ and an attached, dependent______ . a. sporophyte; gametophyte b. gametophyte; sporophyte
The dominant organism in fern is the ________. a. sperm b. spore c. gamete d. sporophyte
Which 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 seed
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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- A 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_forwardThe seed coat forms from the______ . a. integuments c. endosperm b. coleoptile d. sepalsarrow_forwardIn an alternation of generations life cycle, spores developinto____________ that produce gametes that fuse to giverise to__________ .a. haploid gametophytes; diploid sporophytesb. diploid gametophytes; haploid sporophytesc. haploid sporophytes; diploid gametophytesd. diploid sporophytes; haploid gametophytesarrow_forward
- A diploid, multicellular life-cycle stage that gives rise to haploid cells by meiosis is called a ________. a. sporophyte b. gametophyte c. spore d. gametearrow_forwardWhich group of plants bears stomata only in the sporophyte generation? a. Chrysophyta b. Anthocerophyta c. Bryophyta d. Marchantiophyta Which of the following is not a characteristic that distinguishes gymnosperms and angiosperms from other plants? a. Pollen b. Dependent gametophytes c. Ovules d. Alternation of generations Which of these statements is an incorrect comparison of a pine cone and a flower in terms of structure and function? a. Pine cones and flowers both have gametophytes and modified leaves that produce spores. b. All of the statements are correct. c. Unlike pine cones, many flowers produce both pollen and ovules. d. Pine trees have separate pollen cons and ovulate cones while in flowers, pollen grains are produced by the anthers of stamens, and ovules are within the ovaries of carpels.arrow_forwardStem regions at which leaves are attached are called ________. a. trichomes b. lenticels c. nodes d. internodesarrow_forward
- Meiosis of cells in pollen sacs forms haploid______ . a. megaspores c. stamens b. microspores d. sporophytesarrow_forwardFern trees occur whereas moss trees do not because A. the moss sporophyte grows taller than the gametophyte B. the fern tree is a sporophyte, and the gametophyte grows low on the ground while the moss gametophyte grows relatively tall C. ferns do not require swimming sperm D. the fern spores are catapulted away from the sporophytearrow_forwardIn a plant’s male reproductive organs, development of pollen takes place in a structure known as the ________. a. stamen b. microsporangium c. anther d. tapetumarrow_forward
- Subfamilies of the Fabaceae show differentiation in the _______________________? A. Perianth B. gynoecium C. androperianth D. calyx E.arrow_forwardThe 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.arrow_forwardYou find and undescribed plant. You observe that the plant has a sporophyte that grows from a larger, longer lived gametophyte. The plant produces spores as its primary mode of dispersal. You conclude that the plant is a _______. A. seedless vascular plant B. nonvascular plant C. gymnosperm D. fernarrow_forward
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