Tag: kingdom plantae

Quizzes (15) Questions (428)

Questions Related to kingdom plantae

Multiple choice classification of pteridophytes kingdom plantae plant kingdom biology

Which of the following are heterosporous pteridophytes?
I. Lycopodium   II. Selaginella   III. Equisetum   IV. Salvinia

  1. I and II

  2. II and III

  3. III and IV

  4. II and IV

  5. I and IV
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Heterosporous pteridophytes produce two types of spores (microspores and megaspores). Selaginella and Salvinia are classic examples of heterospory.

Multiple choice classification of pteridophytes kingdom plantae plant kingdom biology

Integument like covering of megasporangium occurs in Selaginella

  1. S. apus

  2. S. rupestris

  3. S. sulcata

  4. S. yemensis
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
A) S. apus
The sporophyte is herbaceous. The shoot is dorsiventral and radial and creeping or erect. An ovule consists of a megasporangium, is surrounded by a single covering or integument, and eventually will become a seed.
Multiple choice classification of pteridophytes kingdom plantae plant kingdom biology

Megaspores are retained inside megasporogonium for germination in species of Selaginella

  1. S.bryopteris and S.lepidophylla

  2. S.chrysocaulos and S.subdiaphana

  3. S.selaginoides and S.kraussiana

  4. S.apus and S.rupestris
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In S. bryopteris and S. lepidophylla, megaspores are retained inside the megasporangium (not megasporogonium, which appears to be a typographical error in the question) for germination. This retention of megaspores is a step toward seed habit and occurs in specific Selaginella species. The other species pairs listed are known to release megaspores externally.

Multiple choice classification of pteridophytes kingdom plantae plant kingdom biology

Ptyxis is

  1. Arrangement of leaves on the stem

  2. Arrangement of leaves in the bud

  3. Folding of lamina in bud

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

The folding of lamina in bud condition is called as ptyxis. Arrangement of leaves on the stem branches is called as phyllotaxy. Vernation is the phenomenon of arrangement of leaves in the bud. 

Thus, the correct answer is 'Folding of lamina in bud.'

Multiple choice classification of pteridophytes kingdom plantae plant kingdom biology

Tracheophyta characterised by habitual heterophylly, absence of companion cells and presence of vessels in xylem is

  1. Pteris

  2. Drimys

  3. Selaginella

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

Selaginella is a tracheophyte that exhibits heterophylly (different leaf sizes), lacks companion cells (typical of pteridophytes), and has vessels in its xylem, which is an advanced trait.

Multiple choice classification of pteridophytes kingdom plantae plant kingdom biology

Which species of Selaginella exhibits homophylly?

  1. S. kraussiana

  2. S. helvetica

  3. S. rupestris

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

S. rupestris is known for having uniform leaves, exhibiting homophylly, whereas most other Selaginella species are heterophyllous.

Multiple choice classification of pteridophytes kingdom plantae plant kingdom biology

Which one of the following pairs of plants bears sporangia with two different types of spores?

  1. Selaginella and Equisetum

  2. Equisetum and Pteridium

  3. Selaginella and Marselia

  4. Pteriodium and Marselia
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Heterospory is the production of two distinct types of spores, namely microspores and megaspores. Plants such as Selaginella and Marsilea exhibit heterospory and bear sporangia that produce these two different types of spores.