Complete Exam Guide Subject-wise practice platform
0 XP
Plant Kingdom

Major Gymnosperm Groups Practice Questions

40 free Major Gymnosperm Groups practice questions for the NCERT Biology. Tap an option to answer — you get instant feedback, the correct answer, and a detailed explanation for every question.

Practice in Quiz Mode

Question 1 of 40 Medium

The term 'Gymnosperm' literally translates to which of the following?

  1. A Vessel seeds
  2. B Naked seeds
  3. C Covered seeds
  4. D Woody seeds

Correct answer: Naked seeds

The name is derived from the Greek words 'gymnos' (naked) and 'sperma' (seeds). In these plants, the ovules are not enclosed by any ovary wall and remain exposed both before and after fertilization.

Question 2 of 40 Medium

Which of the following is known as one of the tallest tree species among gymnosperms?

  1. A Cedrus deodara
  2. B Pseudotsuga menziesii
  3. C Sequoia sempervirens
  4. D Cycas revoluta

Correct answer: Sequoia sempervirens

Sequoia, also known as the giant redwood, is one of the tallest tree species in the world. It belongs to the group of gymnosperms which includes medium-sized trees, tall trees, and shrubs.

Question 3 of 40 Medium

The fungal association found in the roots of Pinus is called:

  1. A Coralloid roots
  2. B Mycorrhiza
  3. C Lichens
  4. D Haustoria

Correct answer: Mycorrhiza

Pinus roots have a symbiotic association with fungi called mycorrhiza. This association helps the plant in the absorption of water and minerals, particularly phosphorus, from the soil.

Question 4 of 40 Medium

Specialized roots in Cycas that are associated with nitrogen-fixing cyanobacteria are known as:

  1. A Tap roots
  2. B Adventitious roots
  3. C Coralloid roots
  4. D Pneumatophores

Correct answer: Coralloid roots

Cycas possesses small specialized roots called coralloid roots. These are associated with N2-fixing cyanobacteria like Anabaena and Nostoc, helping the plant obtain nitrogen.

Question 5 of 40 Medium

In which of the following gymnosperms are the stems typically unbranched?

  1. A Pinus
  2. B Cedrus
  3. C Cycas
  4. D Ginkgo

Correct answer: Cycas

Cycas is characterized by having an unbranched, columnar stem. In contrast, other gymnosperms like Pinus and Cedrus have branched stems.

Question 6 of 40 Medium

The leaves of gymnosperms are well-adapted to withstand extremes of temperature, humidity, and wind. In conifers, which feature helps reduce water loss?

  1. A Broad leaf surface
  2. B Needle-like leaves
  3. C Thin cuticle
  4. D Surface stomata

Correct answer: Needle-like leaves

In conifers, the needle-like leaves reduce the surface area exposed to the environment. Their thick cuticle and sunken stomata also play a major role in reducing water loss through transpiration.

Question 7 of 40 Medium

Gymnosperms are considered heterosporous because they produce:

  1. A Only one type of spore
  2. B Haploid microspores and megaspores
  3. C Diploid microspores and megaspores
  4. D Seeds and flowers

Correct answer: Haploid microspores and megaspores

Heterospory is the production of two different kinds of spores. In gymnosperms, these are the haploid microspores (produced in male strobili) and haploid megaspores (produced in female strobili).

Question 8 of 40 Medium

The strobili bearing microsporophylls and microsporangia are called:

  1. A Macrosporangiate
  2. B Pollen cones
  3. C Seed cones
  4. D Ovulate strobili

Correct answer: Pollen cones

Male strobili are also known as pollen cones or microsporangiate strobili. They consist of microsporophylls arranged spirally along an axis, which produce microspores that develop into pollen grains.

Question 9 of 40 Medium

In gymnosperms, the reduced male gametophyte is called:

  1. A Spermatozoid
  2. B Protonema
  3. C Endosperm
  4. D Pollen grain

Correct answer: Pollen grain

The microspore develops into a male gametophytic generation which is highly reduced and confined to only a limited number of cells. This reduced gametophyte is known as a pollen grain.

Question 10 of 40 Medium

The megaspore mother cell is differentiated from one of the cells of the:

  1. A Nucellus
  2. B Integument
  3. C Micropyle
  4. D Chalaza

Correct answer: Nucellus

The nucellus is a mass of parenchymatous cells protected by envelopes (integuments). One cell of the nucellus differentiates into the megaspore mother cell, which then undergoes meiosis.

Question 11 of 40 Medium

What is the ploidy of the endosperm in gymnosperms?

  1. A Haploid (n)
  2. B Diploid (2n)
  3. C Triploid (3n)
  4. D Polyploid

Correct answer: Haploid (n)

In gymnosperms, the endosperm represents the female gametophyte and is formed before fertilization. Therefore, it is a haploid (n) tissue, unlike the triploid (3n) endosperm found in angiosperms.

Question 12 of 40 Medium

Which of the following gymnosperms is dioecious (male and female cones on different trees)?

  1. A Pinus
  2. B Cedrus
  3. C Picea
  4. D Cycas

Correct answer: Cycas

In Cycas, male cones and megasporophylls are borne on different trees, making the plant dioecious. In Pinus, both male and female cones are borne on the same tree, making it monoecious.

Question 13 of 40 Medium

Unlike bryophytes and pteridophytes, in gymnosperms the male and female gametophytes:

  1. A Are free-living
  2. B Are the dominant phase of the life cycle
  3. C Develop into seeds directly
  4. D Lack an independent free-living phase

Correct answer: Lack an independent free-living phase

In gymnosperms, the gametophytes remain within the sporangia retained on the sporophyte. They are not free-living and depend on the sporophyte for nutrition and protection.

Question 14 of 40 Medium

The transfer of pollen grains to the opening of the ovules in gymnosperms is primarily achieved by:

  1. A Water currents
  2. B Insects
  3. C Air currents
  4. D Animals

Correct answer: Air currents

Gymnosperms are primarily anemophilous, meaning they rely on wind or air currents for pollination. The pollen grains are released from the microsporangium and carried to the micropyle of the ovules.

Question 15 of 40 Medium

The pollen tube in gymnosperms carries the male gametes toward:

  1. A The nucellus
  2. B The integument
  3. C The style
  4. D The archegonia

Correct answer: The archegonia

The pollen grain germinates and forms a pollen tube that grows toward the archegonia in the female gametophyte. It discharges the male gametes near the mouth of the archegonia for fertilization.

Question 16 of 40 Medium

Which of the following is a 'living fossil' among gymnosperms?

  1. A Picea abies
  2. B Cycas revoluta
  3. C Cedrus deodara
  4. D Ginkgo biloba

Correct answer: Ginkgo biloba

Ginkgo biloba is often referred to as a living fossil because it is the only surviving member of an ancient group of plants. It has remained relatively unchanged for millions of years.

Question 17 of 40 Medium

In gymnosperms, the zygote develops into the _____ and the ovules develop into _____.

  1. A Seed; fruit
  2. B Endosperm; embryo
  3. C Gametophyte; spores
  4. D Embryo; seeds

Correct answer: Embryo; seeds

Following fertilization, the zygote undergoes development to become the embryo. The ovules, which contain the embryo and stored food, mature into seeds that are not covered by a fruit.

Question 18 of 40 Medium

Why are gymnosperm seeds described as 'naked'?

  1. A They lack an embryo
  2. B They do not have a seed coat
  3. C They lack an ovary wall
  4. D They are dispersed by water

Correct answer: They lack an ovary wall

In gymnosperms, seeds develop from ovules that are borne exposed on megasporophylls. Since there is no ovary, no fruit is formed to enclose the seeds.

Question 19 of 40 Medium

Which gymnosperm group is considered most advanced and shows similarities to angiosperms, such as the presence of vessels in the xylem?

  1. A Cycadales
  2. B Taxales
  3. C Gnetales
  4. D Ginkgoales

Correct answer: Gnetales

Gnetophytes (Gnetales), which include plants like Gnetum and Ephedra, are unique among gymnosperms because they possess vessel elements in their xylem. This feature is typically characteristic of angiosperms.

Question 20 of 40 Medium

The female gametophyte in gymnosperms usually bears how many archegonia?

  1. A Two or more
  2. B Exactly one
  3. C Hundreds
  4. D None

Correct answer: Two or more

In gymnosperms, the multicellular female gametophyte (endosperm) typically develops two or more archegonia, which are the female sex organs containing the egg cells.

Question 21 of 40 Medium

Which of the following groups of gymnosperms includes Cycas?

  1. A Coniferales
  2. B Gnetales
  3. C Cycadales
  4. D Ginkgoales

Correct answer: Cycadales

Cycas belongs to the order Cycadales. This group is characterized by palm-like appearance and large compound leaves.

Question 22 of 40 Medium

Which gymnosperm group includes cone-bearing trees like pine and fir?

  1. A Cycadales
  2. B Coniferales
  3. C Gnetales
  4. D Ginkgoales

Correct answer: Coniferales

Coniferales include cone-bearing trees such as pine, fir, and spruce. These plants are typically evergreen and dominant in cold regions.

Question 23 of 40 Medium

Which gymnosperm is known as a 'living fossil'?

  1. A Cycas
  2. B Pinus
  3. C Ginkgo
  4. D Ephedra

Correct answer: Ginkgo

Ginkgo biloba is considered a living fossil because it has remained morphologically unchanged for millions of years.

Question 24 of 40 Medium

Which gymnosperm group shows advanced features like vessels in xylem?

  1. A Cycadales
  2. B Coniferales
  3. C Gnetales
  4. D Ginkgoales

Correct answer: Gnetales

Gnetales, including Gnetum and Ephedra, possess vessel elements in their xylem, a feature similar to angiosperms.

Question 25 of 40 Medium

Which of the following gymnosperms has fan-shaped leaves?

  1. A Pinus
  2. B Cycas
  3. C Ginkgo
  4. D Ephedra

Correct answer: Ginkgo

Ginkgo has distinctive fan-shaped leaves with dichotomous venation, making it unique among gymnosperms.

Question 26 of 40 Medium

Which gymnosperm group typically has unbranched stems with a crown of leaves?

  1. A Coniferales
  2. B Ginkgoales
  3. C Cycadales
  4. D Gnetales

Correct answer: Cycadales

Cycadales have unbranched stems and a crown of large pinnate leaves, resembling palm trees.

Question 27 of 40 Medium

Which gymnosperm produces seeds that are often winged for dispersal?

  1. A Pinus
  2. B Cycas
  3. C Ginkgo
  4. D Gnetum

Correct answer: Pinus

Pinus produces winged seeds that aid in wind dispersal, a common feature in conifers.

Question 28 of 40 Medium

Which of the following gymnosperms is dioecious?

  1. A Cycas
  2. B Pinus
  3. C Gnetum
  4. D Cedrus

Correct answer: Cycas

Cycas is dioecious, meaning male and female reproductive structures occur on separate plants.

Question 29 of 40 Medium

Which gymnosperm has needle-like leaves adapted to reduce water loss?

  1. A Cycas
  2. B Ginkgo
  3. C Pinus
  4. D Gnetum

Correct answer: Pinus

Pinus has needle-like leaves that reduce surface area and minimize water loss, an adaptation to dry conditions.

Question 30 of 40 Medium

Which gymnosperm group includes plants adapted to arid conditions with jointed stems?

  1. A Cycadales
  2. B Ginkgoales
  3. C Coniferales
  4. D Gnetales

Correct answer: Gnetales

Gnetales, especially Ephedra, have jointed stems and are adapted to dry, arid environments.

Question 31 of 40 Medium

Which gymnosperm has coralloid roots associated with nitrogen-fixing cyanobacteria?

  1. A Cycas
  2. B Pinus
  3. C Ginkgo
  4. D Ephedra

Correct answer: Cycas

Cycas develops coralloid roots that harbor cyanobacteria for nitrogen fixation.

Question 32 of 40 Medium

Which gymnosperm shows mycorrhizal association in roots?

  1. A Cycas
  2. B Ginkgo
  3. C Ephedra
  4. D Pinus

Correct answer: Pinus

Pinus roots form mycorrhizal associations with fungi, helping in nutrient absorption.

Question 33 of 40 Medium

Which gymnosperm group dominates cold and temperate regions?

  1. A Cycadales
  2. B Ginkgoales
  3. C Gnetales
  4. D Coniferales

Correct answer: Coniferales

Coniferales dominate cold and temperate regions due to their adaptations like needle leaves and thick bark.

Question 34 of 40 Medium

Which of the following gymnosperms produces edible seeds that are harvested from its cones?

  1. A Pinus
  2. B Cycas
  3. C Ginkgo
  4. D Ephedra

Correct answer: Pinus

Certain species of Pinus produce edible seeds called pine nuts, which are consumed as food.

Question 35 of 40 Medium

Which gymnosperm has a simple leaf structure unlike other gymnosperms?

  1. A Cycas
  2. B Pinus
  3. C Cedrus
  4. D Ginkgo

Correct answer: Ginkgo

Ginkgo has simple, fan-shaped leaves, unlike the compound leaves of Cycas or needle-like leaves of conifers.

Question 36 of 40 Medium

Which gymnosperm group shows reproductive structures similar to flowers?

  1. A Cycadales
  2. B Coniferales
  3. C Ginkgoales
  4. D Gnetales

Correct answer: Gnetales

Gnetales show some reproductive similarities to flowers, making them evolutionarily significant.

Question 37 of 40 Medium

Which gymnosperm is commonly used as a source of timber?

  1. A Cycas
  2. B Ginkgo
  3. C Ephedra
  4. D Pinus

Correct answer: Pinus

Pinus is widely used for timber due to its straight trunk and high-quality wood.

Question 38 of 40 Medium

Which of the following gymnosperms has motile male gametes?

  1. A Cycas
  2. B Pinus
  3. C Gnetum
  4. D Ephedra

Correct answer: Cycas

Cycas has large, motile male gametes, a primitive feature among gymnosperms.

Question 39 of 40 Medium

Which gymnosperm group includes plants with scale-like leaves?

  1. A Coniferales
  2. B Cycadales
  3. C Ginkgoales
  4. D Gnetales

Correct answer: Coniferales

Some conifers have scale-like leaves that reduce water loss and are adapted to dry environments.

Question 40 of 40 Medium

Which gymnosperm is commonly used in medicine for respiratory problems?

  1. A Ephedra
  2. B Cycas
  3. C Pinus
  4. D Ginkgo

Correct answer: Ephedra

Ephedra is used in traditional medicine for treating respiratory issues due to its alkaloid ephedrine.

0 / 40 answered