BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
10th Edition
ISBN: 9781305967359
Author: STARR
Publisher: CENGAGE L
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Chapter 21, Problem 6SA
Summary Introduction
Introduction:
Plants are multicellular, photosynthetic eukaryotes. These are evolved from unicellular alga which had a photosynthetic pigment called chlorophyll. The plant kingdom can be divided into five divisions: thallophytes,
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The seed coat forms from the______ . a. integuments c. endosperm b. coleoptile d. sepals
Meiosis of cells in pollen sacs forms haploid______ . a. megaspores c. stamens b. microspores d. sporophytes
буmnosperms
Type of spore formed by heterosporous species which give rise to female gametophytes.
A. Hetrospores
B. Mergasporngiav
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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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- The gametophytes of ferns_____ . a. are photosynthetic c. are diploid b. produce spores d. are dependent on the in sori sporophyte for nutritionarrow_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_forwardThe fungi are not considered plants as they once were but are part of the a. eukaryotes b. angiosperms c. Gymnosperms d. prokaryotesarrow_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_forwardPollinators are attracted by the chemicals secreted by plants and its flowers, these pollinators are greatly needed for what types of plants? a. Gymnosperms b.Angiosperms c. Ferns d. Bryophytes *Choose only one answerarrow_forwardBryophytes alone have a relatively large_____ and an attached, dependent______ . a. sporophyte; gametophyte b. gametophyte; sporophytearrow_forward
- 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 seedarrow_forwardClub mosses, horsetails, and ferns are_______ plants. a. multicelled aquatic c. seedless vascular b. nonvascular seed d. seed-bearing vasculararrow_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
- What is the function of the sori found on the underside of the fern fronds a. Gas exchange b. Preventing excessive water loss - c. They contains the spores d. They aid in ph otosynthesis Sori have no known function 名) é.arrow_forwardLignin supports the stems of_______ . a. mosses c. ferns b. hornworts d. liverwortsarrow_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_forward
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