Tag: habit of plants

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Questions Related to habit of plants

Multiple choice botany stem - external morphology habit of plants plant classifications type of plants

Date Palm is?

  1. Caudex

  2. Excurrent

  3. Deliquescent

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

  1. The caudex is the axis of the plant of palm or fern that has a stem as well as root.
  2. The excurrent stem has the axis that is prolonged to form undivided main stem or trunk as in conifers.
  3. Deliquescent is the branching in which stem is not figured out as in deciduous trees.
  4. Culm is an aerial stem of grass.
So the correct option is 'Caudex'

Multiple choice botany stem - external morphology habit of plants plant classifications type of plants

Underground stems are primarily meant for

  1. Vegetative reproduction

  2. Perennation

  3. Protection from strong light

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

Underground stems are primarily modified for perennation, allowing the plant to survive unfavorable conditions, and often for food storage and vegetative propagation.

Multiple choice botany stem - external morphology habit of plants plant classifications type of plants

In one plant, underground stems are modified to store food and in another plant, the stem tendrils develop from axillary buds to help plant climb. They are

  1. Ginger, Cucumber

  2. Carrot, Jasmine

  3. Sweet Potato, Bougainvillea

  4. Opuntia, Eichhornia

  5. Sweet Potato, Mint
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Ginger is a rhizome (underground stem for storage), and Cucumber is a plant that uses stem tendrils derived from axillary buds for climbing.

Multiple choice botany stem - external morphology habit of plants plant classifications type of plants

The special structures used by the climbers for climbing are

  1. Root

  2. Tendrils

  3. Stem

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Climbers are said to have a weak stem and cannot stand by their own so they evolve a mechanism and mostly modify either their leaves or part or leaf that helps them to climb the other plant or can attach with a wall or any other support.

So the correct option is 'Tendrils'.

Multiple choice botany stem - external morphology habit of plants plant classifications type of plants

Which of the following is not a creeper?

  1. Pumpkin

  2. Watermelon

  3. Sweet Potato

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

Creepers are weak plants that grow on ground with the help of fiber like roots that arise from the base of the stem.

ex- Pumpkin, Watermelon, and Sweet potato.
Climbers are the plant that climbs on a support by developing tendrils are modified stem that helps to bind the support.

ex-Bougainvillea and Grapevine.
So the correct option is 'Grapevine'

Multiple choice botany stem - external morphology habit of plants plant classifications type of plants

Anatomically fairly old dicotyledonous root is distinguished from the dicotyledonous stem by :

  1. Position of protoxylem

  2. absence of secondary xylem

  3. Absence of secondary phloem

  4. Presence of cortex
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In the dicotyledonous roots, the protoxylem is located near the periphery of the vascular cylinder. It means away from the centre (exarch condition) and the metaxylem is towards the centre. In the dicotyledonous stem, the protoxylems are located near the centre of vascular bundle means endarch condition and the metaxylem are away from the centre. So, anatomically fairly old dicotyledonous root. One can distinguish it from the dicotyledonous stem by its position of protoxylem.

So, the correct answer is 'Position of protoxylem'.

The correct option is A.

Multiple choice botany stem - external morphology habit of plants plant classifications type of plants

Following are the comparisons between phylloclades and cladodes (cladophylls).

Phylloclade Cladode
(i) Both main stem and branches are modified to function like leaves. Only the branches are modified to take over the function of leaves.
(ii) Phylloclade has limited or definite growth. Cladode has unlimited or indefinite growth.
(iii) It consist of several nodes and internodes.  It is usually one internode long
(iv) True leaves are commonly caducous. True leaves are either reduced to scales or modified to spines.
(v) Example: Rescus aculeatus, Asparagus etc. Example:Opuntia, Euphorbia royleana etc.

Pick up the wrong difference and select the correct option.

  1. (i) and (ii)

  2. (ii) and (v)

  3. (iii) and (v)

  4. (ii) and (iv)
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The table provided contains errors regarding the growth patterns and examples of phylloclades and cladodes. Specifically, point (ii) and (v) are incorrectly swapped or described.