Tag: gymnosperms

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Questions Related to gymnosperms

Multiple choice gymnosperms pictorial feature of plant kingdom biology

Pick out wrong statement :

  1. Double fertilization is unique to gymnosperms and monocotyledons

  2. Sequoia, a gymnosperm, is one of the tallest tree.

  3. Phaeophyceae members possess chlorophyll a, c, carotenoids and xanthophylls

  4. Moss is a gametophyte which consists of two stages namely, protonema stage and leafy stage

  5. Evolutionarily, pteridophytes are the first terrestrial plants to possess xylem and phloem.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Sequoia, a gymnosperm, is one of the tallest trees. 
Phaeophyceae members possess chlorophyll a, c carotenoids and xanthophylls.
Moss is a gametophyte which consists of two stages namely, protonema stage and leafy stage.
Double fertilisation is absent in  gymnosperms. It occurs both in monocotyledons and dicotyledons.
So, the correct option is  'Double fertilization is unique to gymnosperms and monocotyledons.'

Multiple choice gymnosperms pictorial feature of plant kingdom biology

Submerged hydrophytes have commonly dissected leaves for

  1. Decreasing surface area

  2. Increasing surface area

  3. Reducing effects of water currents

  4. Increasing number of stomata
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Plants with both submerged and floating or emerged leaves show heterophylly (Ranunculus), that is, occurrence of more than one type of leaves or dissected leaves (Hydrilla).This prevents the tearing of the leaves that are constantly exposed to water currents.

So, the correct answer is 'Reducing effects of water currents'

Multiple choice gymnosperms pictorial feature of plant kingdom biology

Sporangia of conifers are located in/on

  1. Axils of leaves

  2. Axils of branches

  3. Dwarf shoots

  4. Scales of the cones
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In conifers, the sporangia (microsporangia and megasporangia) are borne on specialized leaves called sporophylls, which are arranged in cones.

Multiple choice gymnosperms pictorial feature of plant kingdom biology

Which one of the following has not changed for the last several thousand years?

  1. Dryopteris

  2. Gnetum

  3. Ginkgo

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

Ginkgo is widely recognized as a living fossil that has shown little morphological change over geological time.

Multiple choice gymnosperms pictorial feature of plant kingdom biology

Which is intermediate between conifers and cycads?

  1. Tsuga

  2. Ephedra

  3. Ginkgo

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

Ginkgo is considered an evolutionary link or intermediate form between cycads and conifers due to its unique combination of primitive and derived traits.

Multiple choice gymnosperms pictorial feature of plant kingdom biology

Conifers are found in

  1. Western Ghats

  2. Eastern Ghats

  3. Rajasthan

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

Conifers are typically found in cool, temperate regions, and in India, they are characteristic of the Himalayan mountain range.

Multiple choice gymnosperms pictorial feature of plant kingdom biology

The scientific name of Pacific Yew is

  1. Acacia samana

  2. Taxus samana

  3. Paradisiaca brevifolia

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

Taxus brevifolia is the scientific name for the Pacific Yew, a gymnosperm known for producing taxol.

Multiple choice gymnosperms pictorial feature of plant kingdom biology

Gnetum, a gymnosperm differs from Cycas and Pinus but shows affinities with angiosperms in the features

  1. Perianth and two integuments

  2. Embryo development and apical meristem

  3. Absence of resin ducts and leaf venation

  4. Presence of vessel elements and absence of archegonia
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Gnetum resembles angiosperms by having vessel elements in the xylem and lacking archegonia in the female gametophyte.