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Test: The Stem (NCERT) - NEET MCQ


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15 Questions MCQ Test Biology Class 11 - Test: The Stem (NCERT)

Test: The Stem (NCERT) for NEET 2024 is part of Biology Class 11 preparation. The Test: The Stem (NCERT) questions and answers have been prepared according to the NEET exam syllabus.The Test: The Stem (NCERT) MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: The Stem (NCERT) below.
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Test: The Stem (NCERT) - Question 1

Read the given statements and select the correct ones. 
(i) Root caps are present in prop roots.
(ii) Pneumatophores help to get oxygen for respiration.
(iii) Edible part of ginger is underground stem.
(iv) Hydrophytes usually possess a well developed root system.

Detailed Solution for Test: The Stem (NCERT) - Question 1

Hydrophytes are plants adapted for growing in waterlogged soil or on a substrate that becomes inundated on a regular basis. In hydrophytes, roots are of secondary importance so they are poorly developed.

Test: The Stem (NCERT) - Question 2

What is the primary function of the stem in plants?

Detailed Solution for Test: The Stem (NCERT) - Question 2

The stem plays a crucial role in plants by spreading out branches that bear leaves, flowers, and fruits. It is responsible for conducting water, minerals, and photosynthates (sugars produced during photosynthesis) throughout the plant. This function is vital for the plant's overall growth and development, as it ensures that all parts of the plant receive the necessary nutrients and energy to thrive.

Test: The Stem (NCERT) - Question 3

What is a tuber?

Detailed Solution for Test: The Stem (NCERT) - Question 3

A tuber is a modified stem that serves the purpose of storing food. It is an adaptation that allows plants, such as potatoes, to store nutrients in underground stems. This not only helps in vegetative propagation but also acts as an organ of perennation, enabling the plant to survive unfavorable growth conditions.

Test: The Stem (NCERT) - Question 4

Which part of the plant is responsible for vegetative propagation in ginger?

Detailed Solution for Test: The Stem (NCERT) - Question 4

The rhizome is the part of the ginger plant responsible for vegetative propagation. It grows horizontally below the soil surface and bears nodes, internodes, and buds. This adaptation allows the plant to spread and reproduce asexually, ensuring the survival and proliferation of the species.

Test: The Stem (NCERT) - Question 5

Read the following statements and select the correct option.
Statement 1: The stem tubers are the swoolen ends of specialized underground stem branches, which help in vegetative propagation of the plant.
Statement 2: Solanum tuberosum is an example of a stem tuber which stores inulin as the main reserve food material.

Detailed Solution for Test: The Stem (NCERT) - Question 5

Stem tuber is an oval or spherical underground swollen stem structure which does not bear adventitious roots, e.g., potato (Solanum tuberosum), Jerusalem artichoke (Helianthus tuberosus). Food reserve is starch in potato and inulin in artichoke.

Test: The Stem (NCERT) - Question 6

In Bougainvillea, weak stems rise up a support by clinging to it with the help of curved thoms, such plants are called as

Detailed Solution for Test: The Stem (NCERT) - Question 6

Bougainvilea is one of many plants that fall into the scamblers category. These plants have long, fleible, curved stem thorns which help them in gripping neighbouring stems and clombing.

Test: The Stem (NCERT) - Question 7

_____ are one internode long runners, usually found in rosette plants at the ground/water level.

Detailed Solution for Test: The Stem (NCERT) - Question 7

Offsets are one internode long, thick, small runner bearing a cluster of leaves in rosette manner at the water or ground level and adventitious roots beow the water or ground level arising from all nodes, e.g., Pistia (water letiuce), Eichhomia crassipes, etc.

Test: The Stem (NCERT) - Question 8

What is the function of stem tendrils?

Detailed Solution for Test: The Stem (NCERT) - Question 8

Stem tendrils are slender, spirally coiled structures that develop from axillary buds. Their primary function is to help plants climb towards sunlight by attaching to surrounding structures. This adaptation is particularly beneficial for plants like cucumber and grapevines, enabling them to grow in environments where direct access to sunlight is competitive.

Test: The Stem (NCERT) - Question 9

Assertion (A): The stem is responsible for the transport of nutrients and water throughout the plant.
Reasoning (R): The stem contains xylem and phloem, which are specialized tissues for the transport of water and nutrients.

Detailed Solution for Test: The Stem (NCERT) - Question 9

The assertion is correct because the stem indeed plays a crucial role in transporting nutrients and water throughout the plant. The reasoning accurately explains this function by mentioning xylem and phloem, the plant's vascular tissues responsible for this transport mechanism.

Test: The Stem (NCERT) - Question 10

The 'eyes' of the potato tuber represent

Detailed Solution for Test: The Stem (NCERT) - Question 10

In potato, the stem nature is evident by the presence of eyes on its brownishy corky surfaces. Each sye is a pit like structure and represents the node. At the rim of the eye, scale leaf scar is seen.Buds are situated in the pit of the eye.

Test: The Stem (NCERT) - Question 11

Assertion (A): Tubers and rhizomes are both underground stem modifications.
Reasoning (R): Both structures are designed to store nutrients and assist in vegetative propagation.

Detailed Solution for Test: The Stem (NCERT) - Question 11

The assertion correctly identifies tubers and rhizomes as underground stem modifications. The reasoning provides a correct explanation, highlighting their roles in nutrient storage and vegetative propagation, which are key functions of these modifications.

Test: The Stem (NCERT) - Question 12

Select the mismatched pair out of the following.

Detailed Solution for Test: The Stem (NCERT) - Question 12

Sucker is a special non-green slender stem  branch which arises from underground base of  an erect shoot or crown. It grows  horizontally in soil and ultimately comes out to  form a new aerial shoot or crown. The process  is repeated. Each sucker has one or more  nodes with scale leaves and axillary buds. e.g.  Chrysanthemum. Curcuma domestica and  Zingiber officinale both are the examples of  rhizomes.

Test: The Stem (NCERT) - Question 13

Assertion (A): Phylloclades are modified stems that perform photosynthesis.
Reasoning (R): In arid regions, phylloclades adapt to minimize water loss by reducing leaf size and assuming the photosynthetic role.

Detailed Solution for Test: The Stem (NCERT) - Question 13

The assertion is true as phylloclades are indeed modified stems that carry out photosynthesis, especially in plants from arid regions. The reasoning correctly explains this adaptation, noting the reduction in leaf size to minimize water loss and the stem's assumption of the photosynthetic function.

Test: The Stem (NCERT) - Question 14

Assertion (A): Stems can modify into tendrils to aid in plant climbing.
Reasoning (R): Tendrils are modified leaves that help plants attach to surfaces.

Detailed Solution for Test: The Stem (NCERT) - Question 14

The assertion is true as stems can indeed modify into tendrils to help plants climb by attaching to surrounding structures. However, the reasoning is false because tendrils can be modified stems or leaves, depending on the plant species. In this context, the focus is on stem modifications.

Test: The Stem (NCERT) - Question 15

Which of the following represents the edible swollen posts of Allium cepa?

Detailed Solution for Test: The Stem (NCERT) - Question 15

Onion (Allium cepa) is a bulb. It is a short, modified, underground stem surrounded by usually fleshy modified leaves that contain stored food for the shoot within. Therefore edible part of onion is fleshy leaves.

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