Tag: botany

Questions Related to botany

Largest moss is

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

  1. Pogonatum

  2. Funaria

  3. Dawsonia

  4. Polytrichum

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Correct Option: C

Sex organs of Anthoceros are

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

  1. Terminal

  2. Borne over dorsal surface of thallus

  3. Embedded

  4. Formed over gametophores

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Correct Option: C

A common hornwort is

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

  1. Anthoceros

  2. Funaria

  3. Marchantia

  4. Riccia

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Correct Option: A

In mosses gametophyte has $2$ stages. What are these stages?

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

  1. $1st$ stage is sporogonium phase and $2nd$ protonema stage

  2. $1st$ stage is protonema and the $2nd$ stage is leafy stage

  3. $1st$ stage is gemmae formation and $2nd$ one is meiosis.

  4. $1st$ stage is zygote and $2nd$ one is Spore mother cell

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Correct Option: A

Archegonia in Riccia are______________.

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

  1. Projecting type and sessile

  2. Projecting type and stalked

  3. Embedded type and sessile

  4. Half embedded type and stalked

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Correct Option: D
Explanation:

The archegonium is a stalked flask-shaped structure with a basally swollen venter and an elongated neck 

First true land plants are

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

  1. Mosses

  2. Ferns

  3. Amphibians of plant kingdom

  4. Produce flowers

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Correct Option: A
Explanation:

The first true land plants were non-vascular plants such as mosses and liverworts that appeared in the early Ordovician period. 

So, the correct answer is 'Mosses'

Mosses are gregarious in nature, because?

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

  1. They show independent alternation of generation

  2. They appear in group

  3. They show haplo-diplontic life cycle

  4. Their antherozoids are biflagellate

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Correct Option: A

The sporophyte in mosses is?

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

  1. Less elaborate than that in liverworts

  2. More elaborates than that in liverworts

  3. Equally elaborate in both

  4. Independent of gametophyte

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Correct Option: A

Elaters are present in the sporogonium of

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

  1. Riccia

  2. Selaginella

  3. Marchantia

  4. Both A and B

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Correct Option: C
Explanation:

Elaters are present in hepaticopsida (marchantia). Pseudoelators are present in Anthocerotopsida. Single layered capsule wall splits into a number of longitudinal valves, which extend from apex towards the middle of capsule. The valves are rolled back due to annular thickenings in jacket cells. Jerky movement of elaters due to their hygroscopic nature leads to loosening up of spore mass and scattering of spores in air.

Which one of them lack foot and seta in sporophyte?

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

  1. Marchantia

  2. Riccia

  3. Anthoceros

  4. Moss

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Correct Option: B