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01. The Leaf

Answer in one line

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Last edited 25 days ago by Learn LoopHQ.

Chapter: 01. The Leaf

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Answer in One Line

Name two benefits plants provide to life on Earth.

Plants provide oxygen for breathing and food for consumption, among many other things.

What is the primary contribution of Carl Linnaeus to science?

Carl Linnaeus is primarily known for developing the Binomial System of biological nomenclature, which is a uniform system for identifying and naming organisms.

What is the average height of Redwood trees?

The average height of Redwood trees is 300 feet (91 meters).

What specific feature of the Great Banyan tree contributes to its immense width?

The Great Banyan tree’s immense width is due to its numerous aerial roots that grow downwards, forming secondary trunks, totaling around 230 trunks and 3,772 aerial roots.

What are the two main parts of a typical leaf?

The two main parts of a typical leaf are the petiole (stalk) and the lamina (leaf blade).

State one function of veins and veinlets in a leaf.

Veins and veinlets provide structural support to the leaf lamina and distribute water and minerals throughout the leaf.

What is venation in leaves?

Venation is the arrangement or pattern of veins in the leaf blade or lamina.

Give an example of a plant with reticulate venation.

Peepal is an example of a plant with reticulate venation.

How is an axillary bud positioned differently in simple vs. compound leaves?

In a simple leaf, an axillary bud is present in the axil of the entire leaf, whereas in a compound leaf, the axillary bud is present in the axil of the rachis (common stalk), but not in the axil of individual leaflets.

Name one plant that has compound leaves.

Neem is a plant that has compound leaves.

State the main function of leaves.

The main function of leaves is photosynthesis, which is the process of manufacturing food for the plant.

How does transpiration help the plant absorb water from the soil?

Transpiration generates a suction force that pulls water and dissolved minerals upwards from the roots through the stem to the leaves.

What gases are exchanged during respiration in plants at night?

During respiration at night, plants take in oxygen and breathe out carbon dioxide through their stomata.

Name two functions of spines as leaf modifications.

Spines help in the conservation of water by reducing transpiration and protect the plant from grazing animals.

Why do insectivorous plants catch insects even though they are green and perform photosynthesis?

Insectivorous plants catch insects to supplement their nitrogen requirement because they typically grow in nitrogen-deficient soils, even though they can produce their own food through photosynthesis.

Describe how Sundew plants trap their prey.

Sundew plants trap their prey using leaves that secrete a sticky, gluey mucilage from glandular hairs, which ensnares insects that land on them.

What is vegetative propagation from leaves?

Vegetative propagation from leaves is a form of asexual reproduction where new plants grow or multiply directly from specialized buds developing along the margins of certain plant leaves.

Give an example of a plant where leaves are modified for vegetative propagation.

Bryophyllum is an example of a plant where leaves are modified for vegetative propagation.

What is the main role of the midrib in a leaf?

The midrib forms the central axis of the lamina and provides structural support to the leaf blade.

In the starch test, what is the purpose of boiling the leaf in alcohol?

The purpose of boiling the leaf in alcohol is to remove the green chlorophyll pigment, which would otherwise obscure the color change caused by the iodine solution when testing for starch.

Name one insectivorous plant whose leaf is modified into a sac-like bladder.

Bladderwort is an insectivorous plant whose leaf is modified into a sac-like bladder.

Besides vegetative propagation, what other special function do modified roots and stems often serve?

Modified roots and stems that are involved in vegetative propagation also often serve the special function of storing food reserves to help the plant survive adverse conditions.

What is the significance of the axillary bud in a plant?

An axillary bud is significant because it can grow into a new branch or a flower, contributing to the plant’s overall growth and branching structure.

How do branches contribute to a plant’s structure and function?

Branches extend from the stem and provide support for leaves, flowers, and fruits, increasing the plant’s surface area for photosynthesis and reproduction.

What is the primary role of fruits on a plant?

The primary role of fruits on a plant is to store food and to protect the seeds within them.

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