Biology · Science General

Botany and Plant Science

5,038 Questions

Botany and plant science delve into the biological study of plant life, covering structural anatomy, physiological processes, and reproductive mechanisms. Key topics include inflorescence patterns, root modifications, and seed development, which are vital for biology sections in medical entrance exams. This collection of practice questions helps solidify understanding of complex plant functions.

Plant ReproductionPlant AnatomyRoot ModificationsInflorescence PatternsPlant Morphology

Botany and Plant Science Questions

Multiple choice botany leaf - external morphology venation arrangement of leaves morphology of leaf

Leave grow due to presence of 

  1. Apical meristan

  2. Diffused meristem

  3. Intercalary meristem

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

The apical meristem, also known as the “growing tip,” is an undifferentiated meristematic tissue found in the buds and growing tips of roots in plants.
So the correct option is 'Apical meristem'.
Multiple choice botany leaf - external morphology venation arrangement of leaves morphology of leaf

If a leaf has more than one prominent vein it is said to be

  1. Unicostate

  2. Multicostate

  3. Pinnate

  4. Palmate
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  • Venation in which the lamina has more than one equally prominent or principal veins is Multicostate reticulate venation
  • They give rise to lateral veins connected by reticulations of veinlets. 
  • Multicostate reticulate venation has two forms. Convergent and Divergent.
  • Hence, If a leaf has more than one prominent vein, it is  Multicostate.
  • So, the correct answer is 'Multicostate'.
Multiple choice botany leaf - external morphology venation arrangement of leaves morphology of leaf

The monocotyledons showing reticulate venation is

  1. Smilax

  2. Dioscorea

  3. Both A and B

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
  • Reticulate venation is found in dicot leaves, while in monocot. Reticulate venation is found in dicot leaves, while in monocot leaves venation is of parallel type.
  •  Monocot having reticulate venation, e.g., Smilax, Colocasia, Dioscorea.
  • Hence, The monocotyledons showing reticulate venation is Smilax and Dioscorea.
  • So, the correct answer is 'Both A and B
Multiple choice botany leaf - external morphology venation arrangement of leaves morphology of leaf

The monocotyledonous leaf shows which of the following venation?

  1. Pinnate reticulate

  2. Parallel

  3. Palmate reticulate

  4. Pinnate parallel
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  • Parallel venation refers to a pattern in the veins of a leaf where the secondary veins run parallel to each other off of a central, perpendicular primary vein. 
  • The best example for parallel venation is banana. Some of the monocotyledons like bajra, sorghum, maize, wheat, rice, grasses, coconut, palm and then dicots like mango also the examples of parallel venation.
  • Hence, The monocotyledonous leaf shows Parallel venation.
  • So, the correct answer is 'Parallel'.
Multiple choice botany leaf - external morphology venation arrangement of leaves morphology of leaf

Reticulate venation is observed mostly in

  1. Monocot plants

  2. Dicot plants

  3. Thallophytes

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

Venation is the arrangement of veins in a leaf. In reticulated venation, veins are interconnected and form a web-like network. There is a prominent vein called the midrib from which many small veins arise which finally form a net-like structure in the lamina. This kind of venation is seen in dicots. for example, mango.

Multiple choice botany leaf - external morphology venation arrangement of leaves morphology of leaf

Venation is monocots in

  1. Pinnate reticulate

  2. Palmate reticulate

  3. Pinnate parallel

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

The phenomenon of arrangement of veins on the leaf is called as venation. There are two types venation, namely reticulate venation and parallel venation. Reticulate venation involves irregular distribution of veins to form a network. Examples of plants showing reticulate venation include rose, tulsi, hibiscus, papaya, ficus. Parallel venation involves the veins running parallel to each other. Examples of plants showing parallel venation include grains, banana, canna, grass, musa. Leaves of monocot plants generally show parallel venation and leaves of dicot plants generally show reticulate venation.

Thus, the correct answer is 'Parallel.'

Multiple choice botany leaf - external morphology venation arrangement of leaves morphology of leaf

Parallel venation occurs in dicot

  1. <p>Corymbium</p>

  2. <p>Ageratum</p>

  3. <p>Carthamus</p>

  4. <p>Centipeda</p>
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Parallel venation means the veins present within the leaves are arranged parallel to each other. These veins never join any other veins. No branching is seen in parallel venation. All the monocots are parallelly venated whereas the dicots have reticulate venation except Corymbium and Calophyllum which are parallelly venated. So, the correct answer is 'Corymbium'.

Multiple choice botany leaf - external morphology venation arrangement of leaves morphology of leaf

Venation is generally reticulate in ________.

  1. Monocot plants

  2. Bryophytes

  3. Thallophytes

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

The phenomenon of arrangement of veins on the leaf is called as venation. There are two types venation, namely reticulate venation and parallel venation. Reticulate venation involves irregular distribution of veins to form a network. Examples of plants showing reticulate venation include rose, tulsi, hibiscus, papaya, ficus. Parallel venation involves the veins running parallel to each other. Examples of plants showing parallel venation include grains, banana, canna, grass, musa. Leaves of monocot plants generally show parallel venation and leaves of dicot plants generally show reticulate venation.

Thus, the correct answer is 'Dicot plants.'

Multiple choice botany leaf - external morphology venation arrangement of leaves morphology of leaf

Anisophylly can be traced in

  1. Trapa

  2. Ranunculus

  3. Strobilanthes

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

Anisophylly is term commonly referred to explain plant having pairs of leaves with the significant difference in their size between two leaves. Goldfussia (Strobilanthes anisophyllus) is an evergreen shrub. It has glossy, dark green leaves of unequal size, which are stained blackish purple on both sides. Mauve flowers appear in spring and intermittently throughout the year. Thus, anisophylly is observed in Strobilanthes.

Multiple choice botany leaf - external morphology venation arrangement of leaves morphology of leaf

A dicot leaf having parallel venation is

  1. <p>Eryngium</p>

  2. <p>Zizyphus</p>

  3. <p>Ricinus</p>

  4. <p>Cassia</p>
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The phenomenon of arrangement of veins on the leaf is called as venation. There are two types venation, namely reticulate venation and parallel venation. Reticulate venation involves irregular distribution of veins to form a network. Examples of plants showing reticulate venation include rose, tulsi, Hibiscus, papaya, Ficus, Bambusa. Parallel venation involves the veins running parallel to each other. Examples of plants showing parallel venation include grains, banana, canna, grass, musa, plum, Zea (maize). Leaves of monocot plants show parallel venation and leaves of dicot plants show reticulated venation. However, there are exceptions in dicots  like Corymbium, Calophyllum, Eryngium. They show parallel venation. 

Thus, the correct answer is 'Eryngium.'

Multiple choice botany leaf - external morphology venation arrangement of leaves morphology of leaf

Reticulate venation is a characteristic of dicots. An exception to this generalisation?

  1. Calophyllum

  2. Ficus

  3. Hibiscus

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

Reticulate venation is a characteristic of dicots while parallel venation is of monocots. But there are some exceptions as some dicot plants show parallel venation, e.g., Calophyllum, Corymbium, etc., and reticulate venation is also shown by some monocot plant e.g., Alocasia, Smilax, etc.

So,the correct answer is " Calophyllum ".

Multiple choice botany leaf - external morphology venation arrangement of leaves morphology of leaf

Parallel venation is observed mostly in

  1. Monocot plants

  2. Dicot plants

  3. Thallophytes

  4. Bryophytes
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Venation is the arrangement of veins in a leaf. Parallel venation is where the secondary veins run parallel to each other and are connected laterally by minute and straight veinlets. This type of venation is mostly seen in monocots, for example, grass. 
So, the correct answer is 'Monocot plants'
Multiple choice botany leaf - external morphology venation arrangement of leaves morphology of leaf

In a leaf with reticulate venation

  1. Veins forms a network on the leaf

  2. Veins run parallel to the midrib

  3. Veins run horizontal to the midrib

  4. Veins criss-cross each other in an irregular pattern
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Venation is the arrangement of veins in a leaf. In reticulated venation, veins are interconnected and form a web-like network. There is a prominent vein called the midrib from which many small veins arise which finally form a net like structure in the lamina. This kind of venation is seen in dicots.

Multiple choice botany leaf - external morphology venation arrangement of leaves morphology of leaf

In a leaf with parallel venation

  1. Veins form a network on the leaf

  2. Veins run parallel to the midrib

  3. Veins run horizontal to the midrib

  4. Veins crisscross each other to from an irregular pattern
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Venation is the arrangement of veins in a leaf. Parallel venation is where the secondary veins run parallel to each other and are connected laterally by minute and straight veinlets. This type of venation is mostly seen in monocots.