Tag: biology

Quizzes (1160) Questions (12174)

Questions Related to biology

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
D Correct answer
Explanation

Matching the botanical structures: Columella aids in spore conduction/support (5), Elater assists in spore dispersal (1), Marsupium provides protection for the sporophyte (2), and Gemma serves as a unit of asexual reproduction (3). This aligns with option D (A-5, B-1, C-2, D-3).

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 biology plant kingdom classification of bryophytes types of bryophytes bryophyta

In moss, sporophyte is formed on

  1. Antheridia

  2. Archegonium

  3. Prothallus

  4. Leafy stage
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In mosses, fertilization occurs within the archegonium, where the egg cell is located. The resulting zygote develops directly into the sporophyte while attached to and dependent on the gametophyte at the archegonium.

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

Immature male gametophyte differs from a mature male gametophyte in that it.

  1. Has not yet left pollen sac

  2. Has not yet germinated and its generative cell has not divided into two male gametes

  3. Is a microspore that has not yet divided by mitosis

  4. Still consists of microsporocyte
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

An immature male gametophyte (pollen grain) consists of a vegetative cell and a generative cell. Upon pollination and germination, the generative cell divides mitotically to produce two male gametes, forming the mature male gametophyte.

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

The female sex organ in Riccia and Funaria is _____________.

  1. antheridium

  2. paraphysis

  3. archegonium

  4. oogonium
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The sex organs in bryophytes (Riccia, Funaria), are multicellular and jacketed. The jacket of the sterile cell around the sperm and egg is an adaptation to a life on land. The male reproductive organs are antheridia and female reproductive organs are archegonia.

So the correct option is B.

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

A sterile jacket around gametangia is found among _______________.

  1. bryophytes

  2. lichens

  3. algae

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

The sex organs in bryophytes {Riccia, Funaria), are multicellular and jacketed. The jacket of the sterile cell around the sperm and egg is an adaptation to a life on land. The male reproductive organs are antheridia and female reproductive organs are archegonia.

So the correct option is A.