Bryophytes Overview Quiz

Questions and Answers

What are the three classes in bryophytes?

Class Hepaticae (liverworts), Musci (mosses), and Anthocerotae (hornworts)

Describe Class Hepaticae.

Liverworts, green gametophytes and photosynthetic, dorsoventrally flattened, bilaterally symmetrical, multicellular reproductive structures, water necessary for fertilization.

Describe Class Musci.

Mosses, erect and radially symmetrical gametophyte, has stemlike and leaflike structures, multicellular reproductive structures, water necessary for fertilization, lack true vascular tissue.

Describe Class Anthocerotae.

Hornworts, gametophyte a multilobed thallus, grows closely appressed to rocks and soil, gametophytes contain nitrogen-fixing cyanobacteria, multicellular reproductive structures. Signup and view all the answers

What is another name for 'plant body'?

Thallus Signup and view all the answers

Define 'dichotomous'.

Y-shaped branching Signup and view all the answers

Define 'leucoplasts'.

They are colorless plastids found in plant cells beneath the air chambers inside the upper and lower epidermis. Signup and view all the answers

Define 'mucilage'.

A gelatinous substance that absorbs water. Signup and view all the answers

How does the plant reproduce?

By asexual reproduction by small plantlets called gemmae. Signup and view all the answers

Define 'dioecious'.

On a plant, there are separate male and female gametophytes and therefore two kinds of reproductive branches. Signup and view all the answers

Define 'protonema'.

A filamentous, branching structure, e.g., mosses. Signup and view all the answers

What is the moss being studied in this lab?

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Define 'calytra'.

The hairy cap covering the terminal capsule. Signup and view all the answers

What is another name for vascular plants?

Tracheophytes Signup and view all the answers

List the three divisions of vascular plants being studied in this lab.

Pterophyta (ferns), Coniferophyta (conifers), Anthophyta (flowering plants) Signup and view all the answers

Describe the Division Pterophyta.

Ferns, small, free-living, and photosynthetic gametophytes, multicellular sex organs called gametangia. Signup and view all the answers

Describe the Division Coniferophyta.

Conifers, needlelike leaves, sporophyte develop into seeds contained in a cone. Signup and view all the answers

Describe the Division Anthophyta.

Flowering plants, flower contains the male (stamen) and female (pistil) parts, pollination through wind/insects. Signup and view all the answers

What is the name of the fern being studied in this lab?

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Study Notes

Bryophytes Classes

Three classes: Hepaticae (liverworts), Musci (mosses), Anthocerotae (hornworts)

Class Hepaticae (Liverworts)

Features green, photosynthetic gametophytes
Dorsoventrally flattened and bilaterally symmetrical structure
Possess multicellular reproductive structures
Dependency on water for fertilization

Class Musci (Mosses)

Characterized by erect, radially symmetrical gametophyte
Gametophyte has stemlike and leaflike structures
Contains multicellular reproductive structures
Requires water for fertilization
Lacks true vascular tissue

Class Anthocerotae (Hornworts)

Gametophyte forms a multilobed thallus, similar to liverworts
Grows closely to rocks and soil
Contains nitrogen-fixing cyanobacteria within gametophytes
Features multicellular reproductive structures

Plant Structure

The plant body is referred to as the thallus

Dichotomous Definition

Describes Y-shaped branching

Leucoplasts

Colorless plastids found in plant cells beneath air chambers in epidermis

Mucilage

A gelatinous substance that has water-absorbing capabilities

Asexual Reproduction

Occurs via small plantlets known as gemmae

Dioecious Definition

Plants having separate male and female gametophytes with distinct reproductive branches

Protonema Definition

A filamentous, branching structure found in mosses

Calytra Definition

A hairy cap that covers the terminal capsule of the plant

Vascular Plants

Also known as tracheophytes

Vascular Plant Divisions

Three divisions include Pterophyta (ferns), Coniferophyta (conifers), and Anthophyta (flowering plants)

Division Pterophyta (Ferns)

Contains small, free-living, and photosynthetic gametophytes
Features multicellular reproductive organs called gametangia

Division Coniferophyta (Conifers)

Recognized by needlelike leaves
Sporophyte develops into seeds encased in cones

Division Anthophyta (Flowering Plants)

Flowers contain male (stamen) and female (pistil) reproductive parts
Pollination typically occurs through wind or insects

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Description

Test your knowledge on bryophytes with this quiz focusing on their three major classes: Hepaticae, Musci, and Anthocerotae. Learn about the distinctive features and characteristics of liverworts, mosses, and hornworts. Perfect for students of botany or anyone interested in plant biology.