Tag: biology

Quizzes (1160) Questions (12174)

Questions Related to biology

Multiple choice examples of bryophytes plant kingdom biology

In Funaria, 20 chromosomes are present in rhizoids, then the number of chromosome in calyptra, theca and foot will be

  1. 20, 40, 40 respectively

  2. 40, 20, 20 respectively

  3. 20, 40, 20 respectively

  4. 40, 10, 20 respectively
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Rhizoids are part of the gametophyte (n=20). The sporophyte structures (calyptra is gametophytic tissue, but theca and foot are sporophytic 2n) have different ploidy. However, in Funaria, the calyptra is haploid (n=20), while theca and foot are diploid (2n=40).

Multiple choice examples of bryophytes plant kingdom biology

In which among the following plants archegonium is present?

  1. Spirogyra

  2. Funaria

  3. Rhizopus

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

Archegonia are the female sex organs found in bryophytes, pteridophytes, and gymnosperms. Among the choices, Funaria is a bryophyte.

Multiple choice examples of bryophytes plant kingdom biology

In Funaria rhizoids are

  1. Unicellular

  2. Multicellular unbranched with transverse septa

  3. Multicellular branched with oblique septa

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

In Funaria, the rhizoids are multicellular, branched, and possess oblique septa.

Multiple choice examples of bryophytes plant kingdom biology

Which of the following statements attributed to the fact that 'Lifecycle of Funaria is not completed without water'?

  1. As fertilization takes place only in the presence of water

  2. As Funaria is a hydrophyte

  3. As plant is delicate and will dry without water

  4. As branches will not develop
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Bryophytes like Funaria require water for the flagellated sperm (antherozoids) to swim to the archegonium for fertilization.

Multiple choice examples of bryophytes plant kingdom biology

The young bryophyte gametophyte that develops following spore germination is known as

  1. Protoderm

  2. Protostele

  3. Protonema

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

There are two different developmental stages of the gametophyte: the Protonema, and the gametophore. The Protonema is the first part of the moss that develops from the germinating spore.

So,the correct answer is C. ( protonema )

Multiple choice examples of bryophytes plant kingdom biology

Funaria can be differentiated from Cycas as it

  1. Has pollen tube

  2. Has antheridia and archegonia

  3. Does not produce fruits

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

Funaria is known as common moss or green moss. The plant body is foliose that consists of stem axis which bears many leaves and instead of roots, rhizoids are present. It is gametophytic (n) and independent. It bears antheridia and archegonia on the same plant but on different branches.

After many years of vegetative growth sex organs develop on Cycas sporophytes in the form of cones or strobili. Cycas is dioecious i.e. male cone and female cone (lax) born on separate sporophytes. The male sporophyte is heterogametic having sex chromosomes-XY while the female sporophyte is homogametic having sex chromosomes-XX.


Multiple choice examples of bryophytes plant kingdom biology

Which of the following is Bryophyte?

  1. Funaria

  2. Volvox

  3. ChIorella

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

Funaria is known as common moss or green moss or cord moss. The main plant body of Funaria is gametophyte and is of two forms.

(1) Juvenile form (creeping protonema).

(2) Adult form (leafy gametophore).

It is characterized by filamentous setae, a gibbous obtusely pyriform capsule, and usually a double peristome of 16 teeth. Clorella, Volvox and Spirulina belongs to the phylum Algae (Thallophyta).

Multiple choice examples of bryophytes plant kingdom biology

The sporogonium of Funaria grows 

  1. On soil

  2. On gametophyte but later becomes free

  3. At the apex of female shoot of the gametophyte

  4. At the apex of male shoot
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The sporogonium in Funaria develops at the apex of the female shoot (gametophore) after fertilization.

Multiple choice examples of bryophytes plant kingdom biology

Sphagnum is used as packing material for transporting living plants because of its

  1. Acidic nature it does not undergo decay

  2. Creeping capacity

  3. Water absorbing capacity

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

Sphagnum do  not decay readily because of the phenolic compounds embedded in the moss's cell walls. Peat moss can also acidify its surroundings by taking up cations, such as calcium and magnesium and releasing hydrogen ions. Due to presence of hyaline cells, they have the large water-holding capacity.

Multiple choice examples of bryophytes plant kingdom biology

In a moss, the sporophyte

  1. Manufactures food for itself, as well as for the gametophyte.

  2. Is partially parasitic on the gametophyte.

  3. Produces gametes that give rise to the gametophyte.

  4. Arises from a spore produced from the gametophyte.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The moss sporophyte is completely dependent upon the gametophyte for its nutrition. The sporophyte is responsible for producing spores.