Biology

Plant Biology and Classification

1,796 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

Lichen is an example of ________.

  1. parasites

  2. saprophytes

  3. symbiotic relationship

  4. insectivorous plants

  5. none of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A lichen is a composite organism that arises from algae or cyanobacteria (or both) living among filaments of a fungus in a symbiotic relationship.

Multiple choice

If different authors give different names to the same species, then which of the following is true?

  1. The name under which the species is first described is valid.

  2. The name under which the species is first described and published in a scientific journal is valid.

  3. All known names are described and a new one is given.

  4. People are at liberty to use any name.

  5. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

If different authors give different names to the same species, the name under which the species is first described and published in a scientific journal is valid.

Multiple choice

Grana are absent in the chloroplast of

  1. shrubs

  2. herbs

  3. algae

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

Many algae (especially certain groups like green algae Chlamydomonas) have chloroplasts that lack grana stacks - their thylakoid membranes are unstacked. Higher plants (shrubs, herbs, trees) all have well-developed grana stacks in their chloroplasts for efficient light capture.

Multiple choice

Which of the following statements is not true?

  1. Corolla of flowers are always green in colour

  2. Ovules are present in the pistil of flower

  3. Filament is a part of androecium

  4. Pollens have only half set of chromosomes
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Corolla consists of petals, which can be of different colours.

Multiple choice

Match the following:

 
a. Stigma 1. It is the middle part of the carpel.
b. Style 2. It is the top part of the carpel.
c. Ovary 3. It is the swollen part at the bottom of the carpel.

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

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

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

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

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

This is the correct option. Stigma is the top part of the carpel. Style is the middle part of the carpel. Ovary is the swollen part at the bottom of the carpel.

Multiple choice

What is the function of cell wall in plants?

  1. Provides shape and flexibility to the cells

  2. Provides green colour to the leaves

  3. Provides brown colour to the bark

  4. Provides shape and rigidity to the cell
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Cell wall provides shape and rigidity to the cell.

Multiple choice

Match the following:

 
a. Genus 1. An assemblage of families resembling one another in a few characters
b. Order 2. A principal taxonomic category that ranks above species and below family
c. Phylum 3. A principal taxonomic category that ranks above class and below kingdom, equivalent to division in botany

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

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

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

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

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

Genus is a principal taxonomic category that ranks above species and below family. Order is an assemblage of families resembling one another in a few characters. Phylum is a principal taxonomic category that ranks above class and below kingdom, equivalent to division in botany.

Multiple choice

Which of the following organisms lack vascular tissues?

  1. Thallophytes

  2. Angiosperms

  3. Gymnosperms

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

Thallophytes lack vascular tissues.Thallophytes are a polyphyletic group of non-mobile organisms, traditionally described as "thalloid plants", "relatively simple plants" or "lower plants".

Multiple choice

Algae belong to which of the following divisions?

  1. Gymnosperms

  2. Thallophytes

  3. Bryophytes

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

Thallophytes – Algae belong to this division.  Algae are photosynthetic and live mainly in water. For example, sea weeds. An alga does not have true leaves, roots or stems as compared to plants. Therefore, it belongs to division Thallophyta.