Tag: classification of bryophytes

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Multiple choice botany pictorial feature of plant kingdom classification of bryophytes types of bryophytes bryophyta

In Bryophyta, simplest sporophyte occur in

  1. Riccia

  2. Marchantia

  3. Funaria

  4. Anthoceros
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Riccia belongs to the class Liver worts. They have dorsiventrally flattened lobed plant body with unicellular rhizoids. The mature sporophyte of Riccia is a globular capsule, embedded within the gametophytic plant and is without foot and seta. The sporophyte contains the mature haploid spores. The spores are liberated by the decay of venter wall and surrounding gametophytic tissue.

Multiple choice botany pictorial feature of plant kingdom classification of bryophytes types of bryophytes bryophyta

In which of the following bryophytes, fragmentation of older thallus, the means of vegetative reproduction?

  1. Riccia

  2. Marchantia

  3. Anthoceros

  4. Both B and C
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Marchantia forms small green disc-shaped biconvex structures, gammae, inside little and shallow gemmae cups. Gemmae are the mode of vegetative reproduction and form thalli on the suitable soil. Means of vegetative reproduction in Riccia include fragmentation, adventitious branches, persistent apices and tuber formation; it does not form gemmae. Sphagnum reproduces vegetatively by formation of innovations. Anthoceros reproduce vegetatively by progressive growth and death of thallus, tubers, persistent apices and gemmae in few species. Thus, the correct answer is option D.

Multiple choice botany pictorial feature of plant kingdom classification of bryophytes types of bryophytes bryophyta

Sphagnum is also called peat moss because?

  1. It grows in acidic marshes(bog) and helps in peat formation

  2. It is found in peat

  3. It decays to form peat

  4. It gets fossilized quickly
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • It also holds onto nutrients so that they aren't rinsed out of the soil when you water the plant. 
  • Peat moss alone does not make a good potting medium. 
  • Sphagnum is sometimes called peat moss because much of the dead material in a peat bog comes from sphagnum moss that grew on top of the bog and induces the formation of peat.
  • So. Option A is correct.

Multiple choice botany pictorial feature of plant kingdom classification of bryophytes types of bryophytes bryophyta

Bryophyta includes

  1. Mosses

  2. Club mosses

  3. Spike mosses

  4. All of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Bryophytes comprises of three classes- Hepaticae (Liver worts), Anthocerotae (Horn worts) and Musci (Mosses). Mosses have erect radially symmetrical leafy plant body produced from a filamentous or thalloid juvenile stage called as protonema. The sporophyte contains large amount of green tissue and is partially dependent upon the gametophyte. e.g., Funaria (cord moss), Sphagnum (Bog or Peat moss), Polytrichum etc. 

Multiple choice botany pictorial feature of plant kingdom classification of bryophytes types of bryophytes bryophyta

Spores do not form protonema but directly grow into flat branching thallus in

  1. Liverworts

  2. Mosses

  3. Ferns

  4. Gymnosperms
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In liverworts, spores germinate directly to form the flat, thalloid gametophyte without forming an intermediate stage. In contrast, moss spores germinate to form a filamentous juvenile stage called a protonema.

Multiple choice botany pictorial feature of plant kingdom classification of bryophytes types of bryophytes bryophyta

Which of these is mismatched?

  1. Phaneros -Visible

  2. Kryptos -Concealed

  3. Gymno - Naked

  4. Bryon - Liverworts

  5. Trachea - Windpipe
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The word bryophyte is the collective term for mosses, hornworts and liverworts and bryology is the study of bryophytes. Bryophytes derived from Greek, 'Bryon' means moss and 'phyte' means plant. 

Multiple choice botany pictorial feature of plant kingdom classification of bryophytes types of bryophytes bryophyta

Which set contains flagellated male gametes?

  1. Pteris , Anthoceros and Funaria

  2. Zygnema,Saprolagnia and Hydrilla

  3. Fucus, Marsilea and Calotropis

  4. Riccia, Dryopteris and Cycas
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Pteris (a pteridophyte), Anthoceros (a hornwort), and Funaria (a moss) all produce motile, flagellated male gametes (antherozoids) that require water for fertilization. Other groups like angiosperms (Hydrilla, Calotropis) produce non-flagellated male gametes.

Multiple choice botany pictorial feature of plant kingdom classification of bryophytes types of bryophytes bryophyta

Sporophyte of Riccia is _______________.

  1. Total parasite

  2. Partial parasite

  3. Saprophyte

  4. Autotroph
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The sporophyte of Riccia is extremely simple, consisting only of a capsule embedded within the gametophytic thallus. Lacking any photosynthetic tissue, foot, or seta to absorb nutrients independently, it is completely dependent on the gametophyte, making it a total parasite.