Tag: gymnosperms

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Questions Related to gymnosperms

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

In which portion of Cycas diploxylic vascular bundles are found ?

  1. Root

  2. Stem

  3. Leaflet

  4. Rachis and leaflet
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The rachis and leaflet have diploxylic vascular bundles. At the region ofthe stem cortex, the leaf trace has only centrifugal xylem, hence, it is endarch. These traces enter the leaf as the rachis separates, the centripetal xylem appears and it is in the exarch condition. The leaflet has a single midrib bundle and is in the diploxylic condition.

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

Gymnosperms and angiosperms show similarity in 

  1. Leaves, rhizomes and spore

  2. Leaves, stems, roots and seeds

  3. Flat leaves, trunks and naked seeds

  4. Lack of vascular tissue and small leaflets

  5. Needle-like leaves, stems, roots and fleshy fruits
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Both gymnosperms and angiosperms are seed-bearing vascular 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. Both have a well-differentiated stem, root and leaves. Thus, the correct answer is option B.

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

Which is present in vascular bundles of gymnosperms?

  1. Tracheids

  2. Vessels

  3. Companion cells

  4. All of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Vessels are limited in growth, are joined end to end to form continuous tubular structures with perforations in their cross walls. Water and minerals are efficiently conducted through these perforations. Vessels are present in most of the angiosperms. Tracheids are elongated and non-perforated. They have only pit pairs, at the regions of union with other tracheids. Conduction of water and minerals is not as efficient as in vessels. Tracheids are found in most of the gymnosperms.
Thus, the correct answer is option A.

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

The gymnospermic endosperm differs from an angiospermic endosperm because in gymnosperm it is

  1. Haploid and developed from female gametophyte

  2. Diploid and developed from female gametophyte

  3. Triploid and developed after fertilization

  4. Triploid and developed before fertilization
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In gymnosperms, the endosperm is formed before fertilization from the female gametophyte, making it haploid. In angiosperms, it is formed after fertilization via triple fusion, making it triploid.

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

Ginkgo is

  1. Evergreen

  2. Deciduous

  3. Phylloclade

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

Gingko biloba, commonly called as gingko, is an endangered genus belonging to division Gymnosperm. It is also a living fossil, as it is the sole survivor of a group of trees that belonged to an era of dinosaurs. The trees rich up to 40 meters in height. It is a deciduous conifer because it sheds its leaves annually. It is found in deciduous forests and valleys. 

So, the correct answer is 'Deciduous'.