Biology

Plant Biology and Classification

1,796 Questions

Plant Biology and Classification deals with the taxonomy, evolution, and morphological features of the plant kingdom. This collection offers practice questions on plant groups, taxonomic hierarchies, and specific plant characteristics. The questions are tailored for students preparing for biology competitive exams.

Plant taxonomyPteridophytesAngiospermsPlant morphologyAlgae and bryophytesClassification systems

Plant Biology and Classification Questions

Multiple choice evs flowers and fruits phanerogams gymnosperms pictorial feature of plant kingdom

Which of the following pair of example will correctly represent the group Spermatophyta, according to one of the schemes of classifying plants?

  1. Acacia, Sugarcane

  2. Pinus, Cycas

  3. Rhizopus, Triticum

  4. Ginkgo, Pisum
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The term Spermatophyta refers to any of a group of higher plants, that produce seeds.  

While there are many schemes of classifying plants, on a broader level the seed plants are classified as angiosperms and gymnosperms. The gymnosperms are plants with 'naked seeds', and it is because the ovule is exposed to the environment and is not covered by a protective layer. 
In contrast in angiosperms, the ovule is contained within a specialized
structure, the carpel. As examples of these two divisions, Ginkgo represents the gymnosperms, while Pisum (Garden pea) from the family Fabaceae correcty represents the angiosperms.

Multiple choice evs flowers and fruits phanerogams gymnosperms pictorial feature of plant kingdom

Gymnosperms are naked seeded plants because

  1. There is no fruit

  2. There is no ovule

  3. There is no fertilization

  4. There is no ovary and fruit.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Gymnosperms are called 'naked-seeded' because their ovules are not enclosed within an ovary wall, and therefore they do not form fruits after fertilization.

Multiple choice evs flowers and fruits phanerogams gymnosperms pictorial feature of plant kingdom

Plants of this group are diploid and were adapted to extreme conditions. They grow bearing sporophylls in compact structures called cones. The group in reference is

  1. Monocot

  2. Dicots

  3. Pteridophyta

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

Gymnosperms are woody, ever green trees. They are found where snow is the source of water and not rains. Their dominant plant body is sporophyte. It is differentiated into roots, stems and leaves. They are xerophytic due to presence of thick bark, scales, cuticles, sunken stomata etc.

So, option D "Gymnopserms" is the correct asnwer.

Multiple choice evs flowers and fruits phanerogams gymnosperms pictorial feature of plant kingdom

Select the correct pair in which one produces seeds, whereas the other does not.

  1. Cyanobacteria and algae

  2. Algae and fungi

  3. Mosses and ferns

  4. Ferns and gymnosperms

  5. Gymnosperms and angiosperms
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Phanerogams, also known as spermatophytes, refer to "all seed plants". Gymnosperms are the seed bearing plants wherein seeds are naked i.e. not enclosed by ovary or fruit. Angiosperms are seed bearing plants wherein seeds are enclosed within ovary or fruit. Since both gymnosperms and angiosperms are seed-bearing plants and therefore are included under phanerogams. Pteridophytes (ferns) are categorized under cryptogams, not under phanerogams, as they do not form seed or flowers. Thus, the correct answer is option D.

Multiple choice evs flowers and fruits phanerogams gymnosperms pictorial feature of plant kingdom

To which group would a plant belong that produces spores, has vascular tissues and bears seeds without fruits

  1. Bryophytes

  2. Pteridophytes

  3. Gymnosperms

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

Gymnosperms are defined as seed-bearing vascular plants where the seeds are not enclosed within an ovary or fruit. Bryophytes lack vascular tissue, and pteridophytes do not produce seeds.

Multiple choice evs flowers and fruits phanerogams gymnosperms pictorial feature of plant kingdom

Cleavage and archegonial polyembroyony is common in

  1. Gymnosperms

  2. Pteridophytes

  3. Angiosperms

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

Polyembryony, the development of more than one embryo in a single seed, is a common feature in gymnosperms, often occurring through cleavage of the proembryo or the presence of multiple archegonia.

Multiple choice evs flowers and fruits phanerogams gymnosperms pictorial feature of plant kingdom

What is correct?

  1. Bryophytes are vascular cryptogams

  2. Pteridophytes are homogenous group of tracheophytes

  3. Cordaitales grow in gymnosperm forests

  4. Gymnosperms are spermatophytes with naked seeds
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Gymnosperms are spermatophytes, meaning they produce seeds, and these seeds are 'naked' because they are not enclosed within an ovary wall or fruit.

Multiple choice evs flowers and fruits phanerogams gymnosperms pictorial feature of plant kingdom

Gymnosperms are naked seeded plants because

  1. There is no fruit

  2. There is no ovule

  3. There is no fertilization

  4. There is no ovary and fruit
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Gymnosperms are called naked-seeded plants because they lack an ovary, which in angiosperms develops into the fruit wall enclosing the seeds.