Assertion & Reason Test: Morphology of Flowering Plants - Grade 11 MCQ

In mustard and china rose flowers, ovary is superior (hypogynous flowers). Ovary is said to be inferior as in flowers of guava (Epigynous flowers)

When stamens are attached to the petals, they are epipetalous as in brinjal. When stamens in a flower are free, they are called polyandrous.

The assertion is true as in monocotyledonous plants, the primary root is indeed short-lived and is replaced by a fibrous root system originating from the base of the stem. The reason is also true and correctly explains the assertion because the fibrous root system provides a more extensive network for efficient water and nutrient absorption from the soil.

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
In imbricate aestivation one petal is completely inward, one petal is completely outward, one margin is internal and another margin is external.
Examples of ascending imbricate is Cassia and gulmohar not the reason.
So, the correct answer is B.
 

The assertion is correct because hydrophytes, which grow in aquatic environments, do not have a root cap. The reason provided is also true and is the correct explanation for the absence of a root cap in hydrophytes, as the primary function of the root cap is to protect the root tip as it moves through the soil, which is unnecessary in water.

Actinomorphic flowers are those flowers which can be divided into two equal halves along any plane of symmetry passing through the central axis. These flowers show radial symmetry, and not bilateral symmetry. For example, Datura, mustard and chilli.
Those flowers which can be divided into two equal halves (right and left) only along a single plane of symmetry passing through the central axis are known as zygomorphic flowers. For example, Cassia and gulmohur.
Hence, both assertion and reason statements are incorrect.
The correct option is C If both assertion and reason are false.

The assertion is true as roots in some plants are indeed modified to perform additional functions beyond their primary roles of absorption and conduction. The reason accurately explains the assertion by listing examples of such modifications, including storage of food (e.g., in carrots), providing support (e.g., prop roots in banyan trees), and aiding in respiration (e.g., pneumatophores in mangroves).