Tag: root systems

Questions Related to root systems

Exarch and polyarch vascular bundles occur in

botany root - external morphology root systems root system in plants forms of root

  1. Monocot stem

  2. Monocot root

  3. Dicot stem

  4. Dicot root

Show answer
Correct Option: B
Explanation:
In monocot root, vascular bundles are radial in arrangement. There are eight bundles each of xylem and phloem. Hence, the condition is described as polyarch. Exarch and polyarch vascular bundles occur in monocot roots. Xylem and phloem elements are combined in a central strand without pith, the stele. The roots of dicot species like wood plants or perennial plants performs secondary growth, while roots of monocots cannot.
Thus, the correct answer is option B.

Tall trees of what range of height have strong buttresses at their base?

botany root - external morphology root systems root system in plants forms of root

  1. $15$ m and above

  2. $5-7$m

  3. $3-5$m

  4. $7-10$m

Show answer
Correct Option: A
Explanation:

Tall trees of range 15m and above have strong buttress because they need to support the whole plant body and its top part from falling or swaying in the extreme environmental conditions.

So, the correct option is '15m and above'.

In Orchis, the adventitious roots are

botany root - external morphology root systems root system in plants forms of root

  1. Fasciculated tuberous

  2. Palmate

  3. Fibrous

  4. Both B and C

Show answer
Correct Option: B
Explanation:
Palmate tuberous roots : In Orchis there is a pair of succulent tuberous root, one of which perishes every year while another new one is formed by its side. Such orchid roots may sometimes be of palmate shape, therefore, called palmate roots.

So, the correct answer is 'Palmate'.

Consider the following statements regarding the root system of angioserms.
I. In monocots, the fibrous root system arises from base of stem.
II. Region of elongation is called root hair zone.
III. In sweet potato, adventitious roots get swollen and store food.
IV. Stem of Maiza and Sugarcane have supporting roots called prop roots.

botany root - external morphology root systems root system in plants forms of root

  1. I and II correct, III and IV wrong

  2. II and III correct, I and IV wrong

  3. II and IV correct, I and III wrong

  4. I and III correct, II and IV wrong

  5. IV correct, I, II, and III wrong

Show answer
Correct Option: D

Which one is correctly matched?

botany root - external morphology root systems root system in plants forms of root

  1. Dahlia - Fasciculated root

  2. Monstera - Fibrous roots

  3. Basil - Prop root

  4. Azadirachta - Adventitious roots

Show answer
Correct Option: A
Explanation:
Fasciculated roots are the type of modified adventitious root. They are tuberous root which become thick due to storage of food. They occur in clusters at the base of the stem; example Asparagus, Dahlia. In Dahlia they lie at the base of the stem while in Asparagus the fasciculated fleshy roots occur at intervals on the normal roots.

So, the correct answer is 'A'.

How many given plants have adventitious root- Maize, Carrot, Sugarcane, Onion.

botany root - external morphology root systems root system in plants forms of root

  1. $1$

  2. $2$

  3. $4$

  4. $3$

Show answer
Correct Option: A

Consider the following statements.
a. Epidermis and cortex of monocot root are similar to those of dicot root.
b. Hypodermis of dicot stem consists of sclerenchymatous cells.
c. The cells of bundle sheath in maize leaf serve as temporary storage cells.
d. The dicot leaf is hypostomatic.
Which of these statements are correct?

botany root - external morphology root systems root system in plants forms of root

  1. $1$ and $2$

  2. $2, 3$ and $4$

  3. $1, 3$ and $4$

  4. $1, 2, 3$ and $4$

Show answer
Correct Option: A

Primary inoculums of red rot of sugarcane comes from _______________.

botany root - external morphology root systems root system in plants forms of root

  1. Mycelium in reddened pith

  2. Conidia and mycelium in buds

  3. Acervuli in the rind

  4. Conidia and mycelium in debris

Show answer
Correct Option: A

Select the mismatched pair.

botany root - external morphology root systems root system in plants forms of root

  1. Tap root system - Dicots

  2. Fibrous root system - Monocots

  3. Fasciculated roots - Curcuma

  4. Slit roots - Sugarcane

Show answer
Correct Option: C
Explanation:
Fasciculated fleshy roots are modified adventitious roots, in which swollen roots or root tubers occur in clusters from lower nodes of stem, e.g. Dahlia and  . In Curcuma, nodulose roots are found where the swellings occur only near the tips.
Tap roots are present in dicots.
Fibrous root is found in monocots.
Slit root is present in sugarcane.
So, the correct answer is 'Fasciculated roots - Curcuma'

Which of the following pairs are correctly by matched?
a. Assimilatory root- Photosynthesis
b. Fasciculate root - Food storage
c. Stilt root- Mechanical support
d. Sucking root- Absorption of moisture from the air
Select the correct answer.

botany root - external morphology root systems root system in plants forms of root

  1. $2, 3$ and $4$

  2. $1, 2$ and $4$

  3. $1, 3$ and $4$

  4. $1, 2$ and $3$

Show answer
Correct Option: A