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

Match the following:

a. Kingdom 1. It is a group of species that are related and have less characters in common as compared to species.
b. Genus 2. It is an assemblage of families resembling one another in a few characters.
c. Order 3. It includes all organisms that share a set of distinguishing common characters.

  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. Kingdom includes all organisms that share a set of distinguishing common characters. Genus is a group of species that are related and have less characters in common as compared to species. Order is an assemblage of families resembling one another in a few characters.

Multiple choice

Match the following:

 
a. Leucoplasts 1. They are the colourless plastids.
b. Chloroplasts 2. They are the coloured plastids (except green-coloured).
c. Chromoplasts 3. They are the green-coloured plastids.

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

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

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

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

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

This is the correct option. Leucoplasts are the colourless plastids. Chloroplasts are the green-coloured plastids. Chromoplasts are the coloured plastids (except green-coloured).

Multiple choice

Which matrix is best suited for phylogenetic analysis?

  1. BLOSUM 80 and PAM 60

  2. BLOSUM 45 and PAM 80

  3. BLOSUM 65 and PAM 250

  4. BLOSUM 30 and PAM 40
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

For phylogenetic analysis of distant homologs, matrices designed for detecting remote similarities are needed. BLOSUM 65 (for moderately divergent sequences) paired with PAM 250 (for very distant relationships) provides the best balance of sensitivity and specificity for deep evolutionary comparisons. Lower BLOSUM numbers detect more distant relationships; higher PAM numbers are for more divergent sequences.

Multiple choice

Consider the following statements:

  1. A group of freely inter-breeding organisms constitutes a species.
  2. Kingdom Fungi possesses the characteristics of both animals and plants.

Which of the given statements is/are correct?

  1. Only 1

  2. Only 2

  3. Both 1 and 2

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

Statement 1 is correct. A species is often defined as a group of organisms capable of interbreeding and producing fertile offspring. Statement 2 is also correct. Kingdom Fungi is placed in between the Kingdoms Plantae and Animalia because it possesses both the characterstics of plants and animals. For e.g. yeast, mushroom, etc.

Multiple choice

Match the following ||| |---|---| | (1) Kingdom Monera | (i) Ferns | | (2) Kingdom Fungi | (ii) Paramecium | | (3) Kingdom Protista | (iii) Yeast | | (4) Kingdom Plantae | (iv) Sponge |

  1. 1 - (ii), 2 - (iii), 3 - (iv) and 4 - (i)

  2. 1 - (iii), 2 - (ii), 3 - (i) and 4 - (iv)

  3. 1 - (iii), 2 - (i), 3 - (ii) and 4 - (iv)

  4. 1 - (ii), 2 - (i), 3 - (iv) and 4 - (iii)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

(1) Kingdom Monera - (ii) Paramecium (2) Kingdom Fungi - (iii) Yeast (3) Kingdom Protista - (iv) Sponge (4) Kingdom Plantae - (i) Ferns

Multiple choice

The spirulina is a type of ___________.

  1. blue green algae

  2. cryptomonas

  3. brown algae

  4. charophyta

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

It is a type of blue green algae, which is rich in protein, vitamins, minerals, carotenoids, and antioxidants that can help to protect the cells from damage. It is made primarily from two species of cyanobacteria; Arthrospira platensis and Arthrospira maxima.

Multiple choice

In lichens, the phycobiont forms a symbiotic relationship by growing together with the partner, which is called _____________.

  1. commensal

  2. mycobiont

  3. photobiont

  4. haustoria

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

Lichens are the association between specific ascomycetes (the fungus) and certain genera of either green algae or cyanobacteria. In lichen, the fungal partner is termed the mycobiont and the algal or cyanobacterial partner is called the phycobiont. It is a type of mutualistic relationship.

Multiple choice

What term is used to mention a distinctive two piece wall of silica in diatoms?

  1. Frustule

  2. Epitheca

  3. Hypotheca

  4. Pellicle

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

A frustule is the hard and porous cell wall or external layer of diatoms. The frustule is composed of silica made from silicic acid, and is coated with a layer of organic substance. This layer is actually composed of several types of polysaccharides. The frustule is usually composed of two overlapping sections known as thecae. The join between two thecae is supported by bands of silica that hold them together. This overlapping allows for some internal expansion room and is essential during the reproduction process. The frustule also contains many pores and slits that provide the diatoms access to the external environment for processes such as waste removal and mucilage secretion.