Tag: plant kingdom

Quizzes (21) Questions (340)

Questions Related to plant kingdom

Multiple choice classification of pteridophytes kingdom plantae plant kingdom biology

The evolutionary advanced features of Selaginella are :
(a) Heterospory
(b) Endosporic development of gametophyte.
(c) Reduced gametophyte
(d) Localization of sporangium bearing appendages in strobili.
(e) Unisexual gametophytes
(f) fertilization with the help of water.

  1. All are correct

  2. All expect (f) are correct

  3. All expect (e) and (f) are correct

  4. All expect (c) is correct.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Selaginella exhibits heterospory, endosporic development, reduced gametophytes, and strobilus formation, which are considered advanced evolutionary traits in pteridophytes.

Multiple choice classification of pteridophytes kingdom plantae plant kingdom biology

Rudimentary seed habit is found in

  1. Selaginella

  2. Lycopodium

  3. Equisetum

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

Rudimentary seed habit means plants are reproducing sexually by seed but it is not fully developed. For e.g. in Selaginella female gametophytes are retained on the parent sporophytes for different periods. Within the female gametophytes, the development of the zygote into young embryos takes place. This event is a very important step in evolution as a precursor to seed habit. 

So the correct option is 'Selaginella'.

Multiple choice classification of pteridophytes kingdom plantae plant kingdom biology

Arrangement of leaves in the bud condition is called _________.

  1. Phyllotaxy

  2. Insertion

  3. Ptyxis

  4. Vernation
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Arrangement of leaves on the stem branches is called as phyllotaxy. 
Insertion is the angle and orientation of the leaves with respect to the axis of the stem. 
The folding of lamina in bud condition is called as ptyxis. 
Vernation is the phenomenon of arrangement of leaves in the bud condition.
Thus, the correct answer is 'Vernation.'
Multiple choice classification of pteridophytes kingdom plantae plant kingdom biology

Which one of the following is not a correct statement ?

  1. Herbarium houses dried, pressed and preserved plant specimens

  2. Botanical gardens have collection of living plants for reference

  3. A museum has collection of photographs of plants and animals

  4. Key is a taxonomic aid for identification of specimens
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Museum is the collection of dead and preserved specimen of animals generally.
So, the correct answer is 'A museum has collection of photographs of plants and animals'
Multiple choice classification of pteridophytes kingdom plantae plant kingdom biology

Heterosporous pteridophytes (e.g., Selaginella) always produce ................ gametophytes

  1. Monoecious

  2. Dioecious

  3. Homothallic

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Heterosporous pteridophytes (e.g., Selaginella) always produce dioecious gametophytes. A heterosporous life history occurs in some pteridophytes and in all seed plants. It is characterized by morphologically dissimilar spores produced from two types of sporangia: microspores, or male spores, and megaspores (macrospores), or female spores. In pteridophytes, megaspores are typically larger than microspores, but the opposite is true in most seed plants.

Multiple choice classification of pteridophytes kingdom plantae plant kingdom biology

The cell of Dryopteris, prothallus contain nucleus with

  1. 4 n chromosomes

  2. 3 n chromosomes

  3. 2 n chromosomes

  4. n chromosomes
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Prothallus is the self supporting haploid plant of the gametophytic generation and is concerned with sexual reproduction. Prothallus is generally monoecious and bears sex organs on the ventral side.

Multiple choice classification of pteridophytes kingdom plantae plant kingdom biology

Microsporangia of Selaginella is ................. in colour.

  1. Purple

  2. White

  3. Yellowish brown

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

In selaginella, the sporangia near the apex of a vertically-held strobilus or along the upper side of a horizontally-held strobilus are darker in color and are oval. These contain many very tiny orange spores, the products of meiosis of several sporocytes. These nearly-microscopic spores are called microspores. This makes their sporangium a microsporangium and the sporophyll a microsporophyll. The microsporangia is yellowish brown in color.

Therefore, the correct answer is option C.

Multiple choice classification of pteridophytes kingdom plantae plant kingdom biology

Equivalent term to strobili of Selaginella is

  1. Rhizophore

  2. Sporangiferous spike

  3. Ligule

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

The strobili of Selaginella or spike moss is heterosporous. It bears both microsporangium and megasporangium on the axis of the microsporophyll and megasporophyll respectively. The strobili with the sporophylls arranged look like a spike or a cone.