Tag: root systems

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Questions Related to root systems

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

Epiblema is epidermal layer of

  1. Monocot leaf

  2. Dicot root

  3. Monocot stem

  4. Dicot stem
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Epiblema is epidermal layer of dicot root. Epiblema is the outermost covering of the root formed by a single layer of compactly arranged, barrel-shaped parenchyma cells. The cells are characteristically thin-walled since, they are involved in absorption of water. A cuticle and stomata are absent. Some of the epiblema cells are produced into long unicellular projections called as root hairs. Hence, epiblema is also known as piliferous layer.
Thus, the correct answer is option B.
Multiple choice botany root - external morphology root systems root system in plants forms of root

A dicot root differs from a monocot root in which of the following

  1. Presence of piliferous layer

  2. Presence of exodermis

  3. Presence of ill - developed pith

  4. Separate radial vascular bundle
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In dicot roots, the pith is either absent or not well developed. On the other hand in case of monocot root, we find a well developed pith across all the genera.
Thus, the correct answer is option C.

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

Which of the following has fibrous root system?

  1. Grass

  2. Pine tree

  3. Spinach

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

Grasses are the monocotyledonous plants. These plants possess the adventitious or the fibrous type of root system. There are many fine thread-like branches which develop from any other part of the plant rather than the radicle. These type of roots do not grow much deeper but spread in the region widely to provide support the plant.

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

Fibrous root system is also called

  1. Tap root system

  2. Tuberous root system

  3. Nodulated root system

  4. Adventitious root system
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The monocotyledonous plants possess the adventitious or the fibrous type of root system. There are many fine thread-like branches which develop from any other part of the plant rather than the radicle. These type of roots do not grow much deeper but spread in the region widely to provide support the plant.

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

A root is adventitious when it is

  1. Swollen

  2. Growing in marshy places

  3. Formed from plumule

  4. Modified for storage
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Adventitious roots do not arise from the radical of the seed. Instead, they can originate from the plumule parts such as stem, branches, leaves, or old woody roots of the plants. Hence, they are termed as adventitious. They commonly occur in monocots and pteridophytes. 

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

Epiphytic roots occur in

  1. Rhizophora

  2. Trope

  3. Vanda

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

The adventitious roots found in the epiphytes are known as the epiphytic root. These roots hang freely in the air and absorb the moisture from the air by a special type of tissue called as velamen. Epiphytic plants are sometimes called as air plants because, they do not have roots in the soil. For example, Vanda.

So, the correct answer is 'Vanda'

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

Sweet potato is homologous to

  1. Ginger

  2. Turnip

  3. Potato

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

Sweet potato and turnip are root modifications. Sweet potato is a type of adventitious roots, which is modified to store food materials. The edible tuberous root is long and tapered. Turnip is a type of tap root. Ginger, potato, Colocasia are underground stem modifications for food storage. Both have the same function but different structure and thus are called as homologous.

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

Prop roots of Banyan tree are meant for

  1. Respiration

  2. Absorption of water from soil

  3. Retention of water in soil

  4. Providing support to big tree
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

When the adventitious roots modified for aerial support is called as prop roots. Prop roots give mechanical support to the aerial branches. The lateral branches grow vertically downward into the soil and act as pillars. Prop or pillar or columnar roots are pillar-like roots which give extra mechanical support to heavy stem branches, e.g., banyan tree. 

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

Which of the following groups of plants are propagated through underground root?

  1. Bryophyllum and Kalanchoe

  2. Ginger, potato, onion and Jamikand

  3. Pistia, Chrysanthemum and Pineapple

  4. Sweet potato, Asparagus, Tapioca and Dahlia

  5. Agave, Wild jam and Oxalis
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Vegetative propagation by roots takes place in modified roots called as tubers. Buds grow from the base of the stem into new plants. These roots are swollen for food storage. For example, Sweet potato, Asparagus, Tapioca and Dahlia.

Therefore, the correct option is D.

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

In Dahlia, the roots are 

  1. Fibrous

  2. Stilt

  3. Moniliform

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

Fasciculated roots are the type of modified adventitious root. They are tuberous root which become thick due to storage of food. These types of roots occur in clusters from the base of the stem, e.g., Asparagus, Tapioca, Dahlia.

Thus, the correct answer is option D.