Tag: biology

Questions Related to biology

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

examples of bryophytes plant kingdom biology

  1. 20, 40, 40 respectively

  2. 40, 20, 20 respectively

  3. 20, 40, 20 respectively

  4. 40, 10, 20 respectively

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Correct Option: A

In which among the following plants archegonium is present?

examples of bryophytes plant kingdom biology

  1. Spirogyra

  2. Funaria

  3. Rhizopus

  4. Brassica

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Correct Option: B

In Funaria rhizoids are

examples of bryophytes plant kingdom biology

  1. Unicellular

  2. Multicellular unbranched with transverse septa

  3. Multicellular branched with oblique septa

  4. Unicellular multinucleate

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Correct Option: C

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

examples of bryophytes plant kingdom biology

  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

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Correct Option: A

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

examples of bryophytes plant kingdom biology

  1. Protoderm

  2. Protostele

  3. Protonema

  4. Sporangium

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Correct Option: C
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 )

Funaria can be differentiated from Cycas as it

examples of bryophytes plant kingdom biology

  1. Has pollen tube

  2. Has antheridia and archegonia

  3. Does not produce fruits

  4. All of the above

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Correct Option: B
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.


Which of the following is Bryophyte?

examples of bryophytes plant kingdom biology

  1. Funaria

  2. Volvox

  3. ChIorella

  4. Spirullina

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Correct Option: A
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).

The sporogonium of Funaria grows 

examples of bryophytes plant kingdom biology

  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

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Correct Option: C

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

examples of bryophytes plant kingdom biology

  1. Acidic nature it does not undergo decay

  2. Creeping capacity

  3. Water absorbing capacity

  4. Both A and C

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Correct Option: D
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.

In a moss, the sporophyte

examples of bryophytes plant kingdom biology

  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.

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Correct Option: B
Explanation:

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