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Test: Pteridophytes (NCERT) - NEET MCQ


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10 Questions MCQ Test Biology Class 11 - Test: Pteridophytes (NCERT)

Test: Pteridophytes (NCERT) for NEET 2024 is part of Biology Class 11 preparation. The Test: Pteridophytes (NCERT) questions and answers have been prepared according to the NEET exam syllabus.The Test: Pteridophytes (NCERT) MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Pteridophytes (NCERT) below.
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Test: Pteridophytes (NCERT) - Question 1

What is the primary evolutionary significance of pteridophytes?

Detailed Solution for Test: Pteridophytes (NCERT) - Question 1

Pteridophytes are significant in evolution because they are the first terrestrial plants to possess vascular tissues, including xylem and phloem, which allow them to transport water and nutrients.

Test: Pteridophytes (NCERT) - Question 2

Read the given statements and select the correct option.
Statement 1: Main Plant body of bryophytes is sporophytic.
Statement 2: Main plant body of pteridopytes is game-tophytic.

Detailed Solution for Test: Pteridophytes (NCERT) - Question 2

The given statements are incorrect. Here's why:

Statement 1: The main plant body of bryophytes is not sporophytic, but gametophytic. Bryophytes are non-vascular plants that include mosses, liverworts, and hornworts. They have a dominant gametophyte stage in their life cycle, meaning the plant body we commonly observe is the gametophyte. The sporophyte is a smaller and simpler structure that is usually attached to and dependent on the gametophyte for nutrition.

Statement 2: The main plant body of pteridophytes is not gametophytic, but sporophytic. Pteridophytes are vascular plants that include ferns and horsetails. They have a dominant sporophytic stage in their life cycle, meaning the plant body we commonly observe is the sporophyte. The gametophyte is a smaller and simpler structure that is independent of the sporophyte.

So, option D is correct: Both statements 1 and 2 are incorrect.

Test: Pteridophytes (NCERT) - Question 3

In pteridophytes, Main plant body is a (i), which is (ii) into true roots, stem and leaves.
Fill the blanks in above statement and select the correct option.
(i)
(a) Sporophyte
(b) Sporophyte
(c) Gametophyte
(d) Gametophyte
(ii)
(a) Differentiated
(b) not differentiated
(c) differentiated
(d) not differentiated

Detailed Solution for Test: Pteridophytes (NCERT) - Question 3

Main Plant Body in Pteridophytes

  • In pteridophytes, the main plant body is a sporophyte. This is because pteridophytes, which include ferns and their allies, have a dominant sporophyte stage in their life cycle.

Differentiation in Pteridophytes

  • The sporophyte in pteridophytes is differentiated into true roots, stem, and leaves.
  • Differentiation in this context refers to the process by which cells or tissues take on specialized characteristics. In pteridophytes, cells in the sporophyte stage differentiate to form various structures such as roots, stems, and leaves.

The correct answer to the given statement: "In pteridophytes, Main plant body is a (i), which is (ii) into true roots, stem and leaves" is (i) Sporophyte and (ii) Differentiated. Hence, the correct option is A.

Test: Pteridophytes (NCERT) - Question 4

In pteridophytes a spore germinates to produce

Detailed Solution for Test: Pteridophytes (NCERT) - Question 4

Pteridophytes, often referred to as ferns and fern allies, are a group of vascular plants that do not produce seeds. Instead, they reproduce and disperse primarily via spores.

Spore production and germination in Pteridophytes

  • Spores in pteridophytes are produced in structures known as sporangia, which are typically borne on the undersides of the fern's leaves (fronds).
  • When the spore germinates, it produces a small, usually heart-shaped, independent gametophyte phase known as a prothallus.

Thus, in pteridophytes, a spore germinates to produce a prothallus

Test: Pteridophytes (NCERT) - Question 5

The heterosporous pteridophytes are

Detailed Solution for Test: Pteridophytes (NCERT) - Question 5

Heterosporous Pteridophytes: Selaginella and Salvinia

The heterosporous pteridophytes are groups of plants that produce two different types of spores, namely microspores (small spores) and megaspores (large spores). These spores give rise to male and female gametophytes, respectively, which is a characteristic feature of sexual reproduction in these plants.

Selaginella

  • Selaginella is a genus of spore-bearing vascular plants often known as spikemosses.
  • It is one of the most well-known heterosporous pteridophytes.
  • It produces two types of spores: microspores and megaspores, which are produced in different sporangia.

Salvinia

  • Salvinia is a genus of free-floating aquatic ferns that also belongs to the group of heterosporous pteridophytes.
  • Like Selaginella, Salvinia also produces two types of spores: microspores and megaspores.

Hence, option B: Selaginella and Salvinia is the correct answer.

Test: Pteridophytes (NCERT) - Question 6

The spread of living pteridophytes is limited and is restricted to narrow geographical region because of 

Detailed Solution for Test: Pteridophytes (NCERT) - Question 6

The spreading of living pteridophytes is limited and is restricted to narrow geographical region because its gametophytes require cool, damp, shady places to grow and also it requires water for fertilization.

Test: Pteridophytes (NCERT) - Question 7

What is the term for the leaf-like appendages that subtend the sporangia in pteridophytes?

Detailed Solution for Test: Pteridophytes (NCERT) - Question 7

The leaf-like appendages that subtend the sporangia in pteridophytes are called sporophylls. They are responsible for bearing the sporangia.

Test: Pteridophytes (NCERT) - Question 8

A Prothallus is

Detailed Solution for Test: Pteridophytes (NCERT) - Question 8
  • Prothallus is a free-living, mostly photosynthetic thalloid gametophyte.
  • It is formed during the life cycle of Pteridophyte.
  • The pteridophyte is a sporophyte i.e. the main plant body is diploid
  • These spores formed inside the sporangia which are borne on the sporophylls.
  • The germination of spores is exosporic i.e. in the soil.
  • These spores germinate to form the gametophyte which is haploid.
  • The gametophyte formed is called prothallus and it is independent as the germination took place outside the sporophyte body in the soil.
  • Prothallus male and female sex organs are called antheridia and archegonia, respectively.
  • Water is required for the transfer of antherozoids – the male gametes released from the antheridia to the mouth of the archegonium.
  • Fusion of the male gamete with the egg present in the archegonium results in the formation of a zygote.
  • The zygote thereafter produces a multicellular well-differentiated sporophyte which is the dominant phase of the pteridophytes.
  • The sporophytic plant undergoes meiosis to form haploid spores.
  • Haploid spores divide by mitosis to form a haploid gametophyte once again. 


So, the correct answer is option 3, A gametophyte-free living structure formed in pteridophytes.

Test: Pteridophytes (NCERT) - Question 9

Heterosporous pteridophytes show certain characteristic which are precursor to the 'seed habit' in gymnosperms. One of such characteristics is

Detailed Solution for Test: Pteridophytes (NCERT) - Question 9

Heterosporous pteridophytes are a group of plants that produce two types of spores - microspores and megaspores. This is a characteristic that they share with seed plants, including gymnosperms. The seed habit refers to the production of seeds, a trait that is not present in pteridophytes but is a defining characteristic of gymnosperms.

Characteristic precursors to the 'Seed Habit'

Development of embryo inside the female gametophyte: This is the correct answer. In heterosporous pteridophytes, the female gametophyte develops within the megaspore, which remains within the parent plant. This is a precursor to the seed habit in gymnosperms, where the embryo develops within the seed that is, in turn, formed within the cone of the parent plant.

Other options provided:

  • Presence of vascular tissues: While the presence of vascular tissues is a significant evolutionary trait, it is not directly linked to the evolution of the seed habit.
  • External water required for fertilization: This is not a precursor to the seed habit. In fact, it's the opposite. One of the key advantages of seeds is that they allow for fertilization without the need for external water.
  • Presence of embryo stage: While the presence of an embryo stage is a key feature of seed plants, it is also present in pteridophytes and hence not specific to the seed habit.

 

Test: Pteridophytes (NCERT) - Question 10

The dominant generation in pteridophytes is

Detailed Solution for Test: Pteridophytes (NCERT) - Question 10

In pteridophytes, dominant free-living generation is diploid sporophytic generation. Sporophyte is differentiated into true roots, stem and leaves. Gametophyte develops from spores and is a short-lived generation.

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