Parts And Function Of Leaf

2.

Where the petiole of the leaf attaches to the stem

Axil
Blade
Tip
Stipule

Correct Answer

A. Axil

Explanation

The axil refers to the angle or space between the petiole (leaf stalk) and the stem. It is the point where the leaf attaches to the stem. In this context, the axil is the correct answer because it accurately describes the location where the petiole of the leaf connects to the stem.

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3.

The broad expanded region of the leaf

Axil
Blade
Vein
Mesophyll

Correct Answer

A. Blade

Explanation

The correct answer is "blade" because the blade refers to the broad expanded region of the leaf. It is the flattened, typically green part of the leaf that is responsible for photosynthesis. The blade is where most of the chlorophyll is located, allowing the leaf to capture sunlight and convert it into energy.

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4.

Is the terminal point of the leaf.

Axil
Petiole
Vein
Tip

Correct Answer

A. Tip

Explanation

The correct answer is "tip" because the statement mentions that it is the terminal point of the leaf. The tip refers to the end or apex of the leaf, which is the furthest point from the base or attachment. This is where the leaf usually tapers or ends in a point.

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5.

Outer most tissue on the lower side of the leaf; protects the leaf

Palisade layer
Upper epidermis
Lower epidermis
Cuticle

Correct Answer

A. Lower epidermis

Explanation

The lower epidermis is the outermost tissue on the lower side of the leaf and it serves to protect the leaf. It is a single layer of cells that acts as a barrier against external factors such as pathogens and excessive water loss. The lower epidermis also contains stomata, which are small openings that allow for gas exchange and regulate transpiration. Overall, the lower epidermis plays a crucial role in maintaining the health and functioning of the leaf.

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6.

Surround the stoma; control the opening and closing of the stoma

Chloroplast
Phloem
Xylem
Guard cells

Correct Answer

A. Guard cells

Explanation

Guard cells are specialized cells found in the epidermis of plant leaves and stems. They surround the stomata, which are small openings that allow for gas exchange in plants. The main function of guard cells is to control the opening and closing of the stomata. When the guard cells are turgid, the stomata open, allowing for the exchange of gases like carbon dioxide and oxygen. When the guard cells lose water and become flaccid, the stomata close, preventing water loss through transpiration. Therefore, guard cells play a crucial role in regulating the movement of gases and water in plants.

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7.

All of the middle tissue of the leaf

Lower epidermis
Upper epidermis
Mesophyll
Xylem

Correct Answer

A. Mesophyll

Explanation

The correct answer is mesophyll because mesophyll refers to the middle tissue of the leaf. It is responsible for carrying out photosynthesis and contains chloroplasts, which are essential for capturing sunlight and converting it into energy. The mesophyll is sandwiched between the upper and lower epidermis layers of the leaf and is where most of the leaf's internal structures, such as veins and xylem, are located.

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8.

Cells in the leaves that trap light energy and convert it to chemical energy

Guard cells
Chloroplasts
Stomata
Chlorophyll

Correct Answer

A. Chloroplasts

Explanation

Chloroplasts are the correct answer because they are the cellular organelles found in plant cells, particularly in the leaves, that are responsible for trapping light energy and converting it into chemical energy through the process of photosynthesis. Chloroplasts contain the pigment chlorophyll, which absorbs light energy, and other necessary components for photosynthesis to occur. Guard cells are responsible for regulating the opening and closing of stomata, which are tiny openings on the surface of leaves that allow for gas exchange. While stomata and chlorophyll are important for photosynthesis, they do not directly trap and convert light energy into chemical energy like chloroplasts do.

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9.

Found in the vein; transports minerals and water from roots to shoots

Xylem
Phloem
Mesophyll
Cuticle

Correct Answer

A. Xylem

Explanation

Xylem is a specialized tissue found in the veins of plants. Its main function is to transport water and minerals from the roots to the shoots of the plant. This tissue is composed of elongated cells called tracheids and vessel elements, which are dead at maturity and form a continuous pathway for water movement. Xylem also provides structural support to the plant. In contrast, phloem is another type of vascular tissue that transports sugars and other organic compounds from the leaves to other parts of the plant. Mesophyll refers to the specialized tissue in the leaves where photosynthesis occurs, while the cuticle is a waxy layer on the surface of the leaves that helps reduce water loss.

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10.

Waxy layer on the covering the epidermis; holds in moisture, prevents too much absorption of water

Guard cells
Cuticle
Upper epidermis
Palisade layer

Correct Answer

A. Cuticle

Explanation

The waxy layer on the covering the epidermis is called the cuticle. The cuticle serves multiple functions. It acts as a protective barrier, preventing excessive water loss from the plant through evaporation. It also helps to reduce the absorption of water, preventing the plant from becoming overhydrated. Additionally, the cuticle plays a role in preventing the entry of pathogens and UV radiation. Overall, the cuticle is essential for maintaining the proper moisture balance and protecting the plant from environmental stressors.

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11.

transports sugar & other products of photosynthesis from leaves to other parts of the plant

Xylem
Phloem
Vein
Stoma

Correct Answer

A. Phloem

Explanation

Phloem is the correct answer because it is responsible for transporting sugar and other products of photosynthesis from the leaves to other parts of the plant. Xylem, on the other hand, transports water and minerals from the roots to the rest of the plant. Veins are the structures that contain both xylem and phloem. Stoma refers to the tiny openings on the surface of leaves that allow for gas exchange.

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12.

Supply support for the leaf; contain the xylem and the phloem

Cuticle
Upper epidermis
Lower epidermis
Vein

Correct Answer

A. Vein

Explanation

Veins in plants provide support for the leaf and contain both the xylem and phloem. The xylem is responsible for transporting water and minerals from the roots to the rest of the plant, while the phloem transports sugars and other organic compounds produced during photosynthesis to other parts of the plant. Additionally, veins also help in distributing nutrients and providing structural stability to the leaf. Therefore, the answer "vein" is correct as it accurately describes the role and function of veins in plants.

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Parts And Function Of Leaf

Makes energy transformation possible in the leave.

Quiz Preview

Where the petiole of the leaf attaches to the stem

The broad expanded region of the leaf

Is the terminal point of the leaf.

Outer most tissue on the lower side of the leaf; protects the leaf

Surround the stoma; control the opening and closing of the stoma

All of the middle tissue of the leaf

Cells in the leaves that trap light energy and convert it to chemical energy

Found in the vein; transports minerals and water from roots to shoots

Waxy layer on the covering the epidermis; holds in moisture, prevents too much absorption of water

transports sugar & other products of photosynthesis from leaves to other parts of the plant

Supply support for the leaf; contain the xylem and the phloem