McGraw-Hill Online Learning Center Test<BLURT>

McGraw-Hill Online Learning Center Test

1. The one or two rows of teeth that play a role in the release of spores from a moss capsule constitute the: A. gametophyte
B. sporophyte
C. peristome
D. operculum
E. calyptra

2. Which of the following have "underleaves" at maturity? A. rock mosses
B. bog mosses
C. "leafy" liverworts
D. thalloid liverworts
E. hornworts

3. The main gametophyte body in mosses consists of: A. a stalk with a capsule at the tip
B. algal-like threads
C. an embryo and a foot
D. mainly rhizoids
E. a "leafy" plant

4. The sporophytes of which of the following consist of a rodlike axis with a meristem at the base? A. true mosses
B. thalloid liverworts
C. leafy liverworts
D. hornworts
E. rock mosses

5. Calyptras: A. are haploid
B. are produced from antheridial tissue
C. are part of the protonemata
D. have the same chromosome number as an operculum
E. all of the above

6. Which of the following is often associated with nitrogen-fixing blue-green bacteria growing in mucilage? A. true mosses
B. hornworts
C. leafy liverworts
D. thalloid liverworts
E. bog mosses

7. The equivalents of xylem cells in some mosses are called: A. hydroids
B. leptoids
C. elaters
D. setae
E. sieve elements

8. The gametophores of those thalloid liverworts that produce them: A. may bear archegonia
B. may bear antheridia
C. may bear sporophytes
D. in some cases develop elaters within a part of the gametophore
E. all of the above

9. Which of the following do plants and green algae NOT have in common? A. starch
B. isogamy
C. cellulose
D. cell plates
E. chlorophylls a and b

10. Thalloid liverworts reproduce asexually by: A. gemmae
B. soredia
C. hyphae
D. conidia
E. rhizomes

11. Which of the following is possessed by most plants but NOT by bryophytes? A. chlorophylls a and b
B. eukaryotic cells
C. xylem and phloem
D. carotenoid pigments
E. embryos

12. Members of which of the following kingdoms generally have multicellular gametangia? A. Monera
B. Protista
C. Fungi
D. Plantae
E. all of the above

13. In Marchantia, the structures which have spiral thickenings, are sensitive to changes in humidity, and aid in the dispersal of the spores are the: A. gemmae
B. stomata
C. elaters
D. setae
E. calyptrae

14. During reproduction of mosses, the embryo grows so much that it exceeds the length of the cavity in the venter. The top of the venter is thus split off and left sitting like a cap on top of the embryo. This cap is the: A. capsid
B. calyx
C. callus
D. calyptra
E. cambium

15. The mature moss sporophyte consists of a capsule and a slender stalk, the seta. The free end of the capsule is usually protected by a small rimmed lid, the: A. operculum
B. operon
C. peristome
D. pericycle
E. peridium

16. A moss protonema: A. has the haploid (N) number of chromosomes in each cell
B. is the sporophyte generation
C. produces gametes directly
D. is saprophytic like a fungus
E. produces spores

17. Archegoniophores and antheridiophores are features of: A. hornworts
B. thalloid liverworts
C. dung mosses
D. peat mosses
E. leafy liverworts

18. Food-conducting cells present in some mosses are known as: A. hydroids
B. leptoids
C. sieve cells
D. sieve-tube elements
E. tracheids

19. From an economic perspective the most important bryophytes are the: A. liverworts
B. rock mosses
C. peat mosses
D. hornworts
E. true mosses

20. Which of the following bryophytes are generally edible? A. rock mosses
B. true mosses
C. peat mosses
D. liverworts
E. none of the above

21. Leafy liverworts constitute about 20% of the known species of liverworts. True

22. The archegonia and antheridia of the thalloid liverwort, Marchantia, develop on gametophores. True

23. Both hornworts and liverworts have thalloid forms. True

24. Most mosses will grow anywhere shade and moisture are provided. True

25. The protonema of a moss may closely resemble a green alga. True

26. The "leaves" of mosses are mostly two cells thick. True

27. Alternation of Generations is less conspicuous in mosses than it is in most other plants. True

28. Both mosses and liverworts produce rhizoids. True

29. Rock mosses are known to absorb at least 20 times their weight in water. True

30. Capsules of mosses normally have xylem tissue. True

31. Peat is a product derived from the dead parts of a moss. True

32. Leptoids are specialized food conducting cells in some mosses that resemble sieve elements. True

33. Meiosis takes place in the stem of mosses. True

34. Since the sperm of mosses are not flagellated, mosses can grow in dry habitats. True

35. Mosses and liverworts produce embryos that are contained in the archegonium. True

Copyright ©2000 The McGraw-Hill Companies. All rights reserved. Any use is subject to the Terms of Use and Privacy Policy.
McGraw-Hill Higher Education is one of the many fine businesses of The McGraw-Hill Companies.
For further information about this site contact
or let us know what you think by filling out our site survey.

Corporate Link