Tag: botany

Quizzes (264) Questions (5276)

Questions Related to botany

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

The row of smaller leaves lying in the mid-ventral line of members of Acrogenous Jungermanniales are termed as _____________.

  1. Amphigastria

  2. Amphithecium

  3. Amphigenous

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

In Jungermanniales, the leaves are arranged in three rows, two lateral and one ventral. The smaller ventral leaves are called amphigastria or underleaves.

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

State whether the following statements are true or false.
Monocots have parallel venation in their leaves, while dicots have netted venation.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Answer A: True
Monocots leaf veins are arranged in parallel venation and dicot leaf veins are arranged in reticulate or netted venation.
Multiple choice botany leaf - external morphology venation arrangement of leaves morphology of leaf

Which of the following kinds of venation is present in banana?

  1. Reticulate unicostate

  2. Reticulate multicostate

  3. parallel unicostate

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

Pinnate or unicostate parallel venation: In such venation, lamina has a single prominent vein or midrib extending from the base to the apex of the lamina, e.g., Banana etc.

So the correct answer is 'parallel unicostate'.

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.

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

Parallel venation is a characteristic of moncots. which of the following is an exception to this generalization?

  1. Smilax

  2. Colocasia

  3. Alocasia

  4. All of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In case of parallel venation, the veins run parallel to each other and network is not formed. This type of venation is the characteristic feature of monocots. There are few exceptions, e.g., Smilax, Colocasia, Alocasia, Dioscorea, etc.
Correct option is D.