Videos
The simplest and most ancient phylum of modern land plants is probably
- a. the
pteridophytes. - b. the cycads.
- c. the liverworts, mosses, or hornworts.
- d. the
angiosperms. - e. none of the above.
Introduction: The angiosperms are known as flowering plants and they also produce seeds. Bryophyta is a phylum which is divided into three divisions, namely the hornworts, liverworts, and the mosses. Pteridophytes are also divided into three divisions and they are the horsetails, ferns, and the lycophytes.
Answer to Problem 1TY
Correct answer: The most ancient and simplest phylum of modern land plants is the liverworts, hornworts, or mosses. Hence, the correct answer is option c.
Explanation of Solution
Reason for correct answer:
Liverworts, hornworts and mosses do not possess any roots, and they do not have vascular tissues as well. These land plants are very small ancient plants. They are usually found in the moist environment as they lack vascular tissues. They are considered as one of the earliest evolving plants.
Option c. is given as, “the liverworts, mosses, or hornworts”.
Liverworts, hornworts and mosses are the most ancient phylum, and the simplest of the modern land plants. Hence, option c. is correct.
Reasons for incorrect answer:
Option a. is given as, “the pteridophytes”.
Pteridophytes possess vascular tissues xylem and phloem and they are taller than the bryophytes. Therefore, they cannot be considered as simplest plant. Hence, option a. is incorrect.
Option b. is given as, “the cycads”.
The cycads belong to gymnosperms and it is not the simplest modern land plants. Hence, option b. is incorrect.
Option d. is given as, “the angiosperms”.
Angiosperm is the most recently evolved plant and it has a highly developed phylum. They are also known as flowering plant. Hence, option d. is incorrect.
Option e. is given as, “none of the above”.
In all the given option, liverworts, mosses, or hornworts are the simplest and ancient plants. Hence, option e. is incorrect.
Hence, the options a., b., d., and e. are incorrect.
Liverworts, mosses, or hornworts are the simplest and ancient group of modern plants.
Want to see more full solutions like this?
Chapter 31 Solutions
BIOLOGY
- Select the taxonomic groups of land plants that produce pollen and seeds (select all the groups that apply). A. mosses b. Angiosperms c. Ferns d. Gymnosperms e. Liverwortsarrow_forwardOne characteristic that separates ferns from complex vascular plants is that ferns do not havea. a vascular system.b. chloroplasts.c. alternation of generations in their life cycle.d. seeds.arrow_forwardWhich of the following is correct with respects to Liverworts, Mosses, and Hornworts? a. They are earths simplest land plants b. Collectively they are known as bryophytes c. Collectively they form a monophyletic group d. Both a and b e. None of the Abovearrow_forward
- Primary meristems produce tissues that A) increase the length of a plant B) produce the cork cambium C) increase the width of a plant D) lead to the production of bark E) increase the mass of a plantarrow_forwardWhich of the following structures is not found in bryophytes? a. a cellulose cell wall b. chloroplast c. sporangium d. rootarrow_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_forward
- In mosses, the leaves are very primitive because: O a. The leaves do not carry out photosynthesis. O b. The leaves arise directly from the roots without any stem. O c. The leaves are tubular, rather than flat. O d. All the cells are identical to each other. The leaves are only found in the sporophyte. Oe.arrow_forwardDescribe the characteristics of the seedless vascular plants. A. Phylum Lycopodiophyta: (Club Mosses) B. Phylum Monilophyta: Class Equisetopsida (Horsetails) C. Phylum Monilophyta: Class Psilotopsida (Whisk Ferns) D.Phylum Monilophyta: Class Polypodiopsida (Ferns)arrow_forwardSelect all statements that are true about the Kingdom Plantae: I. Non=Vascular plants are called bryophytes II. Vascular plants can br further divided into seedless and seed plants III. Seed plants can be divided into gymnosperms and angiosperms. IV. Gymnosperms are flowering plants.arrow_forward
- Which 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 the longest phase of the life cycle.arrow_forwardThe land plants are probably descendants of which of these groups? a. green algae b. red algae c. brown algae d. angiospermsarrow_forwardChoose the best below : How are ferns different from mosses?a. Only ferns produce spores as dispersal agents.b. Ferns have vascular tissue.c. In the fern life cycle, the gametophyte and sporophyte areboth independent.d. Ferns do not have flagellated sperm.e. Both b and c are correct.arrow_forward
Concepts of BiologyBiologyISBN:9781938168116Author:Samantha Fowler, Rebecca Roush, James WisePublisher:OpenStax College
Biology (MindTap Course List)BiologyISBN:9781337392938Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. BergPublisher:Cengage Learning