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The Structures and Functions of Plant Part - I

Description: Biology test
Number of Questions: 21
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Tags: Biology test Roots Plant-Structure Flower Perimeter and Area
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Which of the following is incorrectly matched?

  1. Rose - Tap root

  2. Mango - Fibrous root

  3. Cabbage - Adventitious root

  4. Sugarcane - Adventitious root

  5. Sunflower - Tap root


Correct Option: C
Explanation:

Many plants do not have a main root instead, they have a cluster of fine roots, which come out from the base of the stem. These roots are called fibrous roots or adventitious roots. Cabbage has tap root.

Which of the following is correctly matched?

  1. Axils - Leaf like structures

  2. Nodes - Place on the stem from which leaves and branches arise

  3. Internodes - Thin lines on the surface of leaves

  4. Apics - The point between two nodes

  5. Trunk - The modified roots to store food


Correct Option: B
Explanation:

Nodes are the points on the stem from which leaves and branches arise. The portion of the stem between two nodes is called an internode.  

What are the rope-like structures hanging from the branches of banyan tree called?

  1. Top roots

  2. Fibrous roots

  3. Prop roots

  4. Adventitious roots

  5. Climbing roots


Correct Option: C
Explanation:

Rope like roots hanging from the branches of banyan trees are called prop roots. When these roots reach the soil, they act like pillars supporting the heavy branches of the tree. 

Which of the following is considered as the largest bud?

  1. Potato

  2. Ginger

  3. Chrysanthemum

  4. Balsam

  5. Cabbage


Correct Option: E
Explanation:

Bud is a condensed shoot with the young stem, leaves or flowers crowded together. Cabbages are the largest buds. 

Which of the following is correctly matched?

  1. Turnip - Modified tap roots

  2. Mango - Modified fibrous roots

  3. Ginger - Modified tap roots

  4. Sweet potato - Modified leaves

  5. Dalhia - Modified stem


Correct Option: A
Explanation:

Radish, carrot, and turnip have tap roots, which are modified to store food.

In some plants, a main root grows almost vertically down into the soil and many branches and sub-branches come out from soil. What are such roots called?

  1. Adventitious roots

  2. Fibrous roots

  3. Tap roots

  4. Prop roots

  5. Climbing roots


Correct Option: C
Explanation:

In some plants, a main root grows almost vertically down into the soil and many branches and sub-branches come out from soil. Such roots are called tap roots.

Which among the following plant roots are broad near the base of the stem and tapers towards the tip or apex?

  1. Mustard

  2. Grass

  3. Rice

  4. Wheat

  5. Bamboo


Correct Option: A
Explanation:

In some plants, a main root grows almost vertically down into the soil. It is broad near the base of the stem and tapers towards the tip or apex.

Which of the following is not a function of root of a plant?

  1. To fix the plant firmly to ground

  2. To manufacture food

  3. To absorb water from soil

  4. To prevent soil erosion

  5. To absorb minerals from soil


Correct Option: B
Explanation:

Food is manufactured by green leaves of the plants as they contain chlorophyll, a green pigment that traps sunlight and synthesise food. 

Which of the following statements about tubers is incorrect?

  1. Potato are tubers and they have distinct nodes and internodes.

  2. They are modified plant structures.

  3. These are enlarged to store nutrients.

  4. The tops or sides of the tuber produce shoots.

  5. They are used by plants to provide energy.


Correct Option: A
Explanation:

Potatoes are tubers. Tubers are almost spherical and do not have distinct nodes and internodes.

Which of the following functions is not performed by the stem of a plant?

  1. To hold the plant upright

  2. To support the branches

  3. To bear leaves, buds and flowers

  4. To translocate water, minerals, and food

  5. To absorb water and minerals


Correct Option: E
Explanation:

Water and minerals are absorbed by the roots of a plant. 

What are the coiled structures of passion flower called?

  1. Bulbs

  2. Tubers

  3. Climbers

  4. Tendrils

  5. Creepers


Correct Option: D
Explanation:

In climbers of the ground family and passion flower, some axillary buds develop into coiled structures called tendrils. These tendrils twine around some support like a post or a tree and help the plant for climbing. 

Stem of which of the following plants is modified to produce new plants?

  1. Chrysanthemum

  2. Bryophyllum

  3. China rose

  4. Balsam

  5. Periwinkle


Correct Option: A
Explanation:

In plants like strawberry, mint, and chrysanthemum,  the stem is modified in order to produce new plants. 

Which of the following edible parts of a plant are called the rhizomes?

  1. Potatoes

  2. Ginger

  3. Onion

  4. Garlic

  5. Cabbage


Correct Option: B
Explanation:

Ginger and turmeric roots are called rhizomes. Rhizomes are branched, and have marked nodes and internodes. 

What is the function of prop roots?

  1. To store food

  2. To absorb nutrients

  3. To give support

  4. To attach the plant to any tree or wall

  5. To manufacture food


Correct Option: C
Explanation:

Prop roots of banyan tree like pillars support the heavy branches of the tree. Thus, they give support to the plant. 

Which of the following statements is incorrect?

  1. Petals are brightly coloured to attract birds and insects.

  2. Androecium is the male reproductive part of a flower.

  3. Petiole attach the leaves to the plant stem.

  4. Lamina is the protective covering of the bud.

  5. Veinlets are the thin lines on the leaves of a plant.


Correct Option: D
Explanation:

The wide, flat, green portion of the leaf is called the lamina or the leaf blade. 

Which of the following functions is served by the bark of a tree?

  1. Absorption

  2. Protection

  3. Transpiration

  4. Translocation

  5. Photosynthesis


Correct Option: B
Explanation:

Bark is the outer covering of the stem and protects the stem from harsh conditions. 

Which of the following statements about the roots of different plants is incorrect?

  1. Radish have modified roots to store food.

  2. Mango fruit contains food in its pulp.

  3. Rose plant stores large amount of food in its roots and looks swollen.

  4. Roots of Dahlia are modified to store food.

  5. Turnip looks swollen as it contains nutritious content.


Correct Option: C
Explanation:

Roots of a rose plant do not store food. Radish, carrot, and turnip have tap roots that are modified to store food. Dahlia and mango have fibrous roots, which are also modified to store food.

Which of the following is incorrectly matched?

  1. Banyan tree - Modified roots to give support

  2. Pinus - Thick and scaly bark

  3. Cycas - Modified roots to store food

  4. Cactus - Modified roots to preserve water

  5. Rose - Attractive petals for pollination


Correct Option: D
Explanation:

The stem of a cactus plant is modified to perform the functions of leaves, and leaves are modified into spines to prevent loss of water through transpiration.

Which of the following is correctly matched?

  1. Garlic - Bulbs

  2. Ginger - Tuber

  3. Potatoes - Rhizome

  4. Turmeric - Tuber

  5. Arrowhead - Bulb


Correct Option: A
Explanation:

Both onion and garlic are bulbs. The stem of the bulb is condensed into a flat disc. Ginger and turmeric are rhizomes and potato is a tuber.

Which of the following plants have climbing roots?

  1. Maize

  2. Sugar cane

  3. Pea

  4. Betal

  5. Turnip


Correct Option: D
Explanation:

Some plants with weak stems produce supporting roots, which help to climb. These roots are called climbing roots. The roots of Betal, money plant are the examples of such roots.

Which of the following plants gives additional support to the plant?

  1. Banyan tree

  2. Neem tree

  3. Mango tree

  4. Ashoka tree

  5. Beet root


Correct Option: A
Explanation:

Banyan tree has rope-like roots hanging the branches of banyan trees. They are called the prop roots because they prop up the branches or give them support. 

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