Tag: classification of bryophytes

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Multiple choice biology kingdom plantae classification of bryophytes types of bryophytes bryophyta

Antherozoids of Marchantia are

  1. Short,curved and biflagellate

  2. Short,straight and multi flagellate

  3. Long, straight and biflagellate

  4. Long, curved and biflagellate.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The male gametes, or antherozoids, of Marchantia are small, curved, and biflagellate structures. The two flagella are inserted at the anterior end and help them swim through water to reach the female sex organ (archegonium) for fertilization. This morphology is characteristic of many bryophytes.

Multiple choice biology kingdom plantae classification of bryophytes types of bryophytes bryophyta

Match List-I with List-II and select the correct answer.

List-I List-II
a. Hornwort $1$. Lycopodium
b. Liverwort $2$. Ricciocarpus
c. Stonewort $3$. Anthoceros
d. Clubmoss $4$. Chara
  1. A-$2$, B-$3$, C-$4$, D-$1$
  2. A-$2$, B-$3$, C-$1$, D-$4$
  3. A-$3$, B-$2$, C-$1$, D-$4$
  4. A-$3$, B-$2$, C-$4$, D-$1$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
a. Hornwort - (3) Anthoceros (dependent Sporophyte is horn shaped)
b. Liverwort - (2) Ricciocarpus (has a single species under the genus, the thallus is lobed, is aquatic in habitat)
c. Stonewort - (4) Chara ( Green algae belonging to class Charophyceae, the accumulation and deposition of calcium carbonate, gives it a stone like appearance, hence, stoneworts)
d. Clubmoss - (1) Lycopodium (A Pteridophyte, belonging to family Lycopodiaceae and certain species are used for medicinal purpose).
Multiple choice biology kingdom plantae classification of bryophytes types of bryophytes bryophyta

Elaters are absent in ___________.

  1. Funaria

  2. Marc

  3. Pellia

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

Elaters are specialized, hygroscopic cells that aid in spore dispersal and are found in liverworts like Marchantia, Pellia, and Porella. However, they are absent in mosses such as Funaria. Mosses instead rely on peristome teeth within the capsule for regulated spore dispersal.

Multiple choice biology kingdom plantae classification of bryophytes types of bryophytes bryophyta

Match List-I with List-II and select the correct answer using the codes given the lists.

List-I(Organs) List-II(Functions)
a. Columella $1$. Dispersal
b. Elater $2$. Protection
c. Marsupium $3$. Reproduction
d. Gemma $4$. Decoration
$5$. Conduction
  1. A-$3$, B-$5$, C-$2$, D-$1$
  2. A-$5$, B-$1$, C-$4$, D-$3$
  3. A-$1$, B-$5$, C-$4$, D-$2$
  4. A-$5$, B-$1$, C-$2$, D-$3$
Reveal answer Fill a bubble to check yourself
A Correct answer
Multiple choice biology kingdom plantae classification of bryophytes types of bryophytes bryophyta

Root epidermis is termed as

  1. $Rhizodermis$
  2. $Endothecium$
  3. $Casparian strip$
  4. $Bundle sheath$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The outermost single layer of cells in a root is called the rhizodermis, also known as the epiblema or root epidermis. It lacks a cuticle and stomata, allowing for the efficient absorption of water and minerals from the soil. It also gives rise to unicellular root hairs.

Multiple choice botany kingdom plantae classification of bryophytes types of bryophytes bryophyta

The female sex organs in Riccia and Funaria is

  1. Antheridium

  2. Paraphyses and capsule

  3. Archegonium

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

In Bryophytes, archegonium is the female sex organ. The female shoot arise from the base of the male shoot and called as archegonial branch or archegoniophore. The apex of female shoot is called female receptacle from which cluster of archegonia arise intermixed with non- capitate paraphysis. 

Each archegonium has a stalk, flask-shaped venter and a neck. Venter encloses a basal egg cell (oosphere) and upper smaller venter canal cell. Neck consists of 6 or more neck canal cells (6-11).

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

Which of the following statements is true about bryophytes?

  1. The sporophyte is dependent on gametophyte for support, shelter and nutrition

  2. The sporophyte is haploid

  3. The gametophyte is diploid

  4. The gametophyte is dependent on sporophyte for support, shelte and nutrition
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Bryophytes are gametophyte dominant, meaning that the more prominent, longer-lived plant is the haploid gametophyte. The diploid sporophytes appear only occasionally and remain attached to and nutritionally dependent on the gametophyte.

So, the correct answer is A. (The sporophyte is dependent on gametophyte for support,shelter and nutrition)

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

Moss plants develop from

  1. Oospores

  2. Protonema

  3. Antherozoids

  4. Diploid spores
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In the life cycle of mosses, haploid spores germinate to produce a filamentous, creeping, green, and branched structure called a protonema. The leafy gametophyte, which represents the mature moss plant, then develops as a lateral bud from this protonema stage.