Question

Commelina benghalensis bearing blue coloured short-lived flowers is a ________.

• A. Pteridophyta
• B. Spermatophyta
• C. Dicot
• D. Monocot

Hint:

Check the leaf venation and floral parts to place this plant among monocots or dicots.

Answer 1

The Correct Option is D

Step 1: Understanding the Question.
The question asks us to identify the correct plant group for Commelina benghalensis, a common weed known for its blue, short lived flowers.

Step 2: Key Concept.
Commelina benghalensis, commonly called tropical spiderwort, belongs to the family Commelinaceae. Plants in this family show parallel leaf venation, a fibrous root system, and flower parts in multiples of three, all classic monocot features.

Step 3: Detailed Explanation.
Pteridophytes are seedless vascular plants such as ferns, so this option does not fit since Commelina produces flowers and seeds. Spermatophyta is the very broad group of all seed bearing plants, covering both monocots and dicots, so it is too general when monocot and dicot are also listed as separate choices. Dicots usually show net veined leaves and flower parts in fours or fives, along with a tap root, none of which match Commelina. Commelina benghalensis instead shows parallel venation, a fibrous root system, and three petals per flower, which are the defining marks of a monocot.

Step 4: Final Answer.
Commelina benghalensis is a monocot plant, so option 4 is correct.