BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
10th Edition
ISBN: 9781305967359
Author: STARR
Publisher: CENGAGE L
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Chapter 21, Problem 8SA
Summary Introduction
Introduction:
Ferns and horsetails are seedless vascular plants. These have short-lived and tiny gametophyte. The spores are developed inside the gametophyte and released directly into the environment. The spore of the fern develops inside the sour by meiosis.
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In 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 gametophytes
буmnosperms
Type of spore formed by heterosporous species which give rise to female gametophytes.
A. Hetrospores
B. Mergasporngiav
C. Homospores
D. Megaspores
A diploid, multicellular life-cycle stage that gives rise to haploid cells by meiosis is called a ________. a. sporophyte b. gametophyte c. spore d. gamete
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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- In the alternation of generations in plants, the gametophyte is _______ and produces gametes by _______. a. haploid; mitosis c. haploid; meiosis b. diploid; mitosis d. diploid; meiosisarrow_forward1.a.) In "alternation of generations" or the haplo-diplontic life cycle, what is the name of the cell that makes the male spore? 1.b.) Compared to mosses and liverworts, gymnosperms have fewer cells in the ______ stagearrow_forwardDomesticated banana plants produce seedless fruit because they are______ . a. triploid d. propagated by grafting b. monocots e. treated with colchicine c. endangered f. infected with Phylloxeraarrow_forward
- The seed coat forms from the______ . a. integuments c. endosperm b. coleoptile d. sepalsarrow_forwardThe dominant organism in fern is the ________. a. sperm b. spore c. gamete d. sporophytearrow_forwardSome plants reproduce vegetatively and have a life cycle that features the alternation of haploid and diploid generations. The ii in organisms showing alternation of generations in their life cycles. The statement given above is completed by the information in row i_is genetically is genetically iv and the iii Rowi A. gametophytehaploidsporophyte diploid B. sporophyte haploidgametophytediploid C. sporophyte diploid gametophytetriploid D. gametophytehaploidsporophyte triplod ii 111 liv 1Varrow_forward
- A seed is a(n)_______ . a. female gametophyte c. mature pollen tube b. mature ovule d. immature microsporearrow_forwardLabel the diagram below of alternation of generations in flowering plants.arrow_forwardno need to explain just need to know if its a,b c, or d 1.) Alternation of generation refers to the alternation of diploid and haploid generation. What is the difference between the alternation of generation in moss and pine? a.) In moss, gametophyte is dominant; whereas, in pine, sporophyte is dominant. b.) In moss, sporophyte is dominant; whereas, in pine, gametophyte is dominant. c.) In moss, gametophyte is dependent on sporophyte; whereas, in pine, sporophyte is dependent on gametophyte. d.) In moss, meiosis occurs during gamete formation; whereas, in pine, it occurs in zygote formation. 2.) Meiosis involves two phases, meiosis I and meiosis II. This type of cell division occurs during the formation of both sperm and ovum. The first meiotic division of the primary spermatocyte results in two secondary spermatocytes. .What is the result of the first meiotic division of the primary oocyte? a.) two secondary oocytes b.) two polar bodies c.) two ovum d.) one secondary oocyte and…arrow_forward
- I need the answer as soon as possiblearrow_forwardWhich of the following is not true for gemmae? *a.They are a small clusters of cells. b.They are lightweight and are blown hundreds of miles -- getting dispersed over a wide area. c.They grow into new plants that are genetically different from of the original plant d. They are easily dislodged by rain, wind, or animals.arrow_forward1.Embryogenesis follows while the ovary matures into fruit.B. The ovule becomes the seed. A.If both statements are correct. B.If statement A is wrong and B is correct. C.If statement A is correct and B is wrong. D.If both statements are wrong. 2. A. An embryo sac (ovule) contains eight haploid nuclei.B. Three nuclei become three synergids, 2 polar nuclei, 3 antipodal nuclei. A.If statement A is wrong and B is correct. B.If both statements are wrong. C.If both statements are correct. D.If statement A is correct and B is wrong. 3. A. Inside a pollen grain there is a tube cell and generative cell. B. Generative cell divides to produce two sperm cells while the tube cell becomes pollen tube elongates along the style. A.If both statements are correct. B.If statement A is wrong and B is correct. C.If statement A is correct and B is wrong. D.If both statements are wrong.arrow_forward
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