Tag: gymnosperms

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Questions Related to gymnosperms

Multiple choice biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

Liana is a

  1. Herb

  2. Shrub

  3. Tree

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

A. Herbs are plants with short and pliable stems. For example, rice.

B. Shrubs are plants with a persistent, woody, short or medium stem. For example, lemon.
C. Trees are plants with long, erect, woody stems. For example, mango.
D. Vines are plants with the growth habit of climbing or trailing stems. example: Liana.
So, the correct answer is 'Vine'.

Multiple choice biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

A marine angiosperm is?

  1. Hydrilla

  2. Potamogeton

  3. Zostera

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

Zoster marina, also called as 'seawrack' is a marine angiosperm because it lives in aquatic environments mainly marine in nature. It is rarely exposed to air. it anchors via its rhizomes into the sand bed. But it requires sunlight to grow, thus have long leaves. 

The correct answer is 'Zostera'.

Multiple choice biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

A herb is the one having.

  1. Green soft and shirt stems

  2. Woody short stems

  3. A number of flowers and fruits

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

A. Green, soft & short stems are the characteristic feature of herbs.

B. Woody short stems are seen in shrubs but not in herbs 
C. The number of flowers and fruits are seen mainly in trees. It can be seen in some herbs like banana but not all.
D. Some herbs do have annual growth but not all herbs are annual. they can be perennial such as rosemary etc.
So, the correct answer is 'Green soft and shirt stems'.
 

Multiple choice biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

Which of the following is/ are an angiospermic hydrophyte?

  1. Hydrilla

  2. Vallisneria

  3. Zizyphus

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

Hydrilla andVallisneria are angiospermic hydrophytes because they are flowering plants which have adapted to living in aquatic environments. They are also referred to as macrophytes.

So, the correct answer is 'Both A and B'.

Multiple choice biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

Which group possesses vessels in its xylem

  1. Pteridophytes

  2. Angiosperms

  3. Gymnosperms

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

Vessel members are the principal water-conducting cells in angiosperms (though most species also have tracheids) and are characterized by areas that lack both primary and secondary cell walls, known as perforations. Water flows relatively unimpeded from vessel to vessel through these perforations, though fractures and disruptions from air bubbles are also more likely. 

So, the correct answer is 'Angiosperms.'

Multiple choice biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

An angiosperm lacking vessels is

  1. Trochodendron

  2. Acacia

  3. Salix

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

Trochodendron is a genus of flowering plants with one living species, Trochodendron aralioides, and six extinct species known from the fossil record. Trochodendron aralioides is an evergreen tree or large shrub growing to 20 m tall. Trochodendron and Tetracentron lack vessel elements in their wood, a quite unusual feature in angiosperms. 

So, the correct answer is 'Trochodendron.'

Multiple choice biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

Dominance of angiosperms can be considered due to evolution of

  1. Seed

  2. Fruit

  3. Vascular system

  4. Extensive root system
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Global domination of any species depends on its ability to effectively reproduce. Thus, vascular system or extensive root system, though essential for survival, will not increase the population of the species. Angiosperms developed from gymnosperms or the plants with naked seeds, meaning that seeds evolved before the time of angiosperms. The presence of fruit makes angiosperms reproduce successfully by protecting the seeds and increasing their chances of survival.
So, the correct answer is 'Fruit'.
Multiple choice biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

Angiosperm lacking vessels is

  1. Mangifera

  2. Dillenia

  3. Magnolia

  4. Drimys.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Vessels are only found in xylem of angiosperm but exceptionally it is also present in some Gymnosperms like Ephedra, Gnetum and Welwitschia. Vessels are absent in some Angiospermic plants such as Dracaena, Yucca, Dazinaria, Drimys.
So, the correct answer is 'Drimys.'