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Assertion & Reason Test: Morphology of Flowering Plants - NEET MCQ


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10 Questions MCQ Test Topic-wise MCQ Tests for NEET - Assertion & Reason Test: Morphology of Flowering Plants

Assertion & Reason Test: Morphology of Flowering Plants for NEET 2024 is part of Topic-wise MCQ Tests for NEET preparation. The Assertion & Reason Test: Morphology of Flowering Plants questions and answers have been prepared according to the NEET exam syllabus.The Assertion & Reason Test: Morphology of Flowering Plants MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Assertion & Reason Test: Morphology of Flowering Plants below.
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Assertion & Reason Test: Morphology of Flowering Plants - Question 1

Directions : In the following question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following.

Assertion : Pea has vexillary type of aestivation.

Reason : In this type of aestivation, the posterior petal is the largest and covers almost the two lateral petals, and the latter in their turn, nearly overlap the two anterior or smallest petals.

Detailed Solution for Assertion & Reason Test: Morphology of Flowering Plants - Question 1
In vexillary type of aestivation, the posterior petal is the largest and covers almost the two lateral petals, and the latter in their turn, nearly overlap the two anterior or smallest petals. e.g, pea. This type of gestational is also called as descending imbricate aestivation.
Assertion & Reason Test: Morphology of Flowering Plants - Question 2

Directions : In the following question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following.

Assertion : In perigynous flowers is ovary is called half-inferior.

Reason : Rose and plum plants bear perigynous flowers.

Detailed Solution for Assertion & Reason Test: Morphology of Flowering Plants - Question 2
In perigynous flowers , ovary is situated at the centre and other parts are on the rim of the thalamus hence, ovary is called half-inferior.
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Assertion & Reason Test: Morphology of Flowering Plants - Question 3

An example of a plant belonging to family Solanaceae.

Detailed Solution for Assertion & Reason Test: Morphology of Flowering Plants - Question 3
Tomato belongs to family Solanaceae. Plants of this family are herbs or shrubs, rarely small trees, commonly known as potato family. Leaves are simple or pinnately compound having reticulate venation.
Assertion & Reason Test: Morphology of Flowering Plants - Question 4

Ovary is half -inferior in

Detailed Solution for Assertion & Reason Test: Morphology of Flowering Plants - Question 4
Plum has perigynous flowers. The ovary is situated at the centre and other parts are on the rim of the thalamus. Ovary is called half-inferior.

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

Assertion & Reason Test: Morphology of Flowering Plants - Question 5

When stamens are attached to the perianth, the condition is called

Detailed Solution for Assertion & Reason Test: Morphology of Flowering Plants - Question 5
When stamens are attached to the perianth as in the flowers of lily, they are called epiphyllous.

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

Assertion & Reason Test: Morphology of Flowering Plants - Question 6

Assertion (A): In monocotyledonous plants, the primary root is short-lived and is replaced by a large number of roots originating from the base of the stem.

Reason (R): Monocotyledonous plants have a fibrous root system that helps in providing a more extensive network for water and nutrient absorption.

Detailed Solution for Assertion & Reason Test: Morphology of Flowering Plants - Question 6

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.

Assertion & Reason Test: Morphology of Flowering Plants - Question 7

Assertion :In imbricate aestivation, out of five petals, one is completely internal. One is completely external and in each of the remaining three petals, one margin is internal and the other is external.

Reason: Ascending imbricate aestivation is found in Cassia and gulmohar.

Detailed Solution for Assertion & Reason Test: Morphology of Flowering Plants - Question 7

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.
 

Assertion & Reason Test: Morphology of Flowering Plants - Question 8

Assertion (A): The root cap is absent in hydrophytes.

Reason (R): Hydrophytes are plants that grow in water, where the soil is not present to offer resistance to root growth.

Detailed Solution for Assertion & Reason Test: Morphology of Flowering Plants - Question 8

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.

Assertion & Reason Test: Morphology of Flowering Plants - Question 9

Read the assertion and reason carefully to mark the correct option in question.

Assertion: Datura, mustard and chilli shows actinomorphic/bilateral symmetry.

Reason: These flowers can be divided into two similar halves only in one particular vertical plane.

Detailed Solution for Assertion & Reason Test: Morphology of Flowering Plants - Question 9

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.

Assertion & Reason Test: Morphology of Flowering Plants - Question 10

Assertion (A): In some plants, roots are modified to perform functions other than absorption and conduction of water and minerals.
Reason (R): Modification of roots includes changes in shape and structure to store food, provide support, and help in respiration.

Detailed Solution for Assertion & Reason Test: Morphology of Flowering Plants - Question 10

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).

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