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

Which of the following pairs is incorrectly matched?

  1. Gymnosperms - Cycas, Ginkgo

  2. Red algae - Gelidium, Polysiphonia

  3. Bryophytes - Funaria, Marchantia

  4. Angiosperms - Adhatoda, Cedrus
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Angiosperms are so named because the seeds are enclosed within a flower, which has male and female reproductive structures. Gymnosperms are plants in which the ovules are not enclosed by any ovary wall and remain exposed or naked both before and after fertilisation. Adhatoda is an angiosperm, but cedrus belongs to gymnosperm.

Multiple choice

Bryophytes resemble algae in most of the aspects, except in the

  1. presence of thalloid plant body

  2. presence of vegetative reproduction

  3. independence on water for fertilisation

  4. presence of jacketed and multicellular sex organs
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Sex organs are well developed and multicellular. Sexual reproduction is not well organized in algae and sex organs are not complex but unicellular.

Multiple choice

Which of the following is a set of red algae?

  1. Laminaria, Rhodella, Fucus

  2. Gelidium, Nostoc, Laminaria

  3. Gelidium, Nemalion, Fucus

  4. Rhodella, Nemalion, Gelidium

  5. Vaucheria, Nostoc, Rhodella
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Correct answer. Rhodella, Nemalion and Gelidium are genus of red algae.

Multiple choice

On the basis of nutrition, Comandra umbellata is characterised as

  1. holoparasite

  2. hemiparasite

  3. endoparasite

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

Comandra umbellata is characterised as a hemiparasitic plant. It just obtains water and mineral nutrients from the host plant. The host includes Acer, Antennaria, Aster, Betula, Carex, Solidago, Fragaria, Populus, Oaks, Rosa, Rubus, Vaccinium and some grasses.

Multiple choice

Which of the following is called walking fern?

  1. Lycopodium

  2. Pteridium

  3. Adiantum

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

Adiantum is called walking fern. In Adiantum, new plantlets grow wherever the arching leaves of the parent touch the ground, creating a walking effect. 

Multiple choice

Lichens represent ______.

  1. mutualism

  2. parasitism

  3. commensalism

  4. amensalism

  5. protocooperation
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In this, both the partners get benefited. Lichen is a composite organism consisting of a fungus (the mycobiont) and a photosynthetic partner (phycobiont) growing together in a symbiotic relationship.

Multiple choice

Which of the following is not a family of angiosperms?

  1. Altingiaceae

  2. Cycadaceae

  3. Platanaceae

  4. Brassicaceae

  5. Theaceae
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Cycadaceae is an ancient palm like plant closely related to ferns in that fertilization is by means of spermatozoids. It belongs to the family of gymnosperms.

Multiple choice

The given symptoms are associated with which of the following diseases?

An infected tobacco plant exhibits the following symptoms:

1. Chloretic leaves

2. Virescence (greening of flowers)

3. Phyllody (development of leaf-like flower petals)

4. Reduced root system and sterility

 

  1. Stolbur

  2. Aster yellow

  3. Reniform

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

Aster yellow is caused by a bacterium-like organism called a phytoplasma. The symptoms include vein clearing until the entire leaf becomes chlorotic, stunting, deformation, virescence (greening of flowers), phyllody (development of leaf-like flower petals), reddening of foliage, reduced root system and sterility.