Biology

Plant Biology and Classification

1,473 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

The smallest taxon is called

  1. class

  2. order

  3. genus

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

In the taxonomic hierarchy (Kingdom, Phylum, Class, Order, Family, Genus, Species), species is the smallest and most basic taxonomic unit. A species consists of organisms that can interbreed and produce fertile offspring. Genus, order, and class are progressively higher taxonomic categories that contain multiple species.

Multiple choice

The plant which belongs to the Reed-Swamp stage in hydrarch succession is

  1. juncus

  2. sagittaria

  3. salix

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

Sagittaria (arrowhead) is an aquatic plant characteristic of the reed-swamp stage in hydrarch (water-based) succession. Hydrarch succession progresses from phytoplankton to submerged plants to floating plants to reed-swamp stage (with plants like Sagittaria, Scirpus) to sedge meadow to woodland to climax forest. Juncus (rush) is also in reed-swamp, but Sagittaria is more representative. Salix (willow) and Trapa (water chestnut) appear in later stages.

Multiple choice

Match the following:

a. Species 1. It is represented by a group of related genera that are more similar to each other than with the genera of other families.
b. Family 2. It includes all organisms who share a set of distinguishing common characters.
c. Kingdom 3. It is a group of similar organisms that are able to breed together and produce fertile offsprings.

  1. a - 3, b - 1, c - 2

  2. a - 3, b - 2, c - 1

  3. a - 1, b - 2, c - 3

  4. a - 1, b - 3, c - 2

  5. a - 2, b - 1, c - 3
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This is the correct option. 

Multiple choice

Consider the following statements:In fern plants,

  1. vascular system is absent
  2. reproductive organs are multicellular Which of the statements given above is/are correct?

  1. 1 only

  2. 2 only

  3. Both 1 and 2

  4. Neither 1 nor 2
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Statement 2 is correct - ferns have multicellular reproductive organs (archegonia and antheridia), which distinguishes them from more primitive plants like mosses. Statement 1 is incorrect - ferns DO have a vascular system (xylem and phloem) for transporting water and nutrients, which is why they can grow larger than non-vascular plants. This makes them vascular plants (Pteridophytes).

Multiple choice

Which of the following is/are saprophytic angiosperm/s?

  1. Eucalyptus

  2. Cuscuta

  3. Neottia

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

Saprophytes are those plants which grow on dead and decaying organic matter of animals and plants. Neottia grows on humus rich soil. The plant has underground rhizome which form a cluster of roots. The roots of Neottia are associated with endotrophic mycorrhiza.

Multiple choice

In which order of gymnosperms, only fossils are present?

  1. Gnetales

  2. Coniferales

  3. Cycadofilicales

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

Order cycadofilicales of gymnosperms include only fossils. Plants of order cycadofilicales showed some characters of ferns and other characters of gymnosperms, e.g., Medullosa.