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2. Classify plants and give an example of each.

Ans: On the basis of various characteristics most of the plants can be classified into three categories:

(i) Herbs, e.g. tomato

(ii) Shrubs, e.g. lemon

(iii) Trees, e.g. mango

Stem modifications:

Stems of certain plants are modified to perform special functions.

Some of the modifications and their functions are given below.

For storage of water Stems of plants like cactus and jade swell up to store water in them.

To manufacture food Stems of some plants become leaf-like and flattened like that of a cactus and perform photosynthesis.

For protection Stems may be modified as thorns, like in bougainvillea or may be in the form of hard and sharp prickles, as in rose (Fig. 8.5), to protect the plant from being eaten by animals.

For support Stems of some climbers like grapes and passion flower are modified to form special structures called tendrils (Fig. 8.6). These help the climber plants like, which have weak stems, attach themselves to others for support.

For storage of food Potato, onion, and ginger are modified stems that store food. There are three kinds of underground stems: tubers (e.g., potato), rhizomes (e.g., ginger), and bulbs (e.g., onion and garlic) (Fig. 8.7).

For multiplication of the plant Rhizomes, bulbs, and tubers also help in the multiplication of plant. Stem cuttings of some plants like rose, jasmine, and hibiscus grow into new plants.

Leaves:

Leaves are known as food factories of the plant. They arise from at the nodes of the stems and have a characteristic shape and size. Let us study its different parts (Fig. 8.8).

The arrangement of veins in a leaf is termed as venation. Venation is of two types: parallel and reticulate. If the veins run parallel to one another from the base to the tip of the leaf, the leaf is said to have parallel venation, e.g., banana and onion (Fig. 8.9). If the veins are arranged in a net-like pattern on both sides of the midrib the leaf is said to have reticulate venation, e.g., peepal and mango (Fig. 8.10).

Functions of a leaf:

A leaf performs various important functions for the plant.

It is usually green due to the presence of a green pigment called chlorophyll. A leaf prepares food for the plants. The process of making food by the plant using carbon dioxide, water, chlorophyll, and light is called photosynthesis.

Plants store food in the leaves, fruits, and stems in the form of starch.

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Botanical taxonomy, or the study of systematics and classification of plants, is based on a hierarchy. In the world of horticulture and home gardening, the species name and named selections of that species or hybrids between the different species will be the most important name to know when communicating about a plant, so these are the names that will be discussed.

There are parts to a scientific name. The first part is called the generic name and it is capitalized and in italics. This is the name of the genus, which in the taxonomic hierarchy is below family. Plants that are closely related are placed in the same genus. There are many generic names that you already know, such as Magnolia, Impatiens, Rhododendron, Hibiscus, Hydrangea. You know these because they also serve as common names, so you are already ahead of the game getting to know scientific plant names!

Finally, many plants in the horticulture trade are hybrids or cultivated varieties (cultivars) of species and have a third word or set of words called the cultivar epithet. These names appear after the specific epithet or in the case of some hybrids, after the generic name and are in plain text and appear in single quotes. Cultivar epithets are typically easier to learn for home gardeners since they were developed in a modern language (not necessarily English, though). Since these names indicate a specific clone of the species that offers particular characteristics, when shopping for a plant you will need to know the cultivar epithet of the plant you desire.

Answer 23: Medium-sized plants known as shrubs have branched stems that are bushy and hard but not particularly thick. Near the base, their stem branches out. Examples of shrubs are jasmine rose, lemon, henna, etc.

You should learn about plants to produce enough food for a growing world population to develop sustainable cropping practices, producing healthy and nutritious food. Plant research enriches our intellectual life and adds to our knowledge about other life processes. Apart from this, we can also improve and secure the food supply for an increasing world population, improve fibre production, identify new sources of bioactive compounds and medicines, and identify sources of biofuels and biorenewable resources.

CBSE Class 6 Science Notes Chapter 7 Getting to Know Plants Pdf free download is part of Class 6 Science Notes for Quick Revision. Here we have given NCERT Class 6 Science Notes Chapter 7 Getting to Know Plants. -know-plants-cbse-notes-class-6-science/

question_answer55) DIRECTIONS: Read the passage (s) given below and answer the questions that follow. Passage-2 Various parts of a plant are stem, branches, roots, leaves, flowers and fruits. Plants are classified on the basis of differences in their heights, stems and branches. Branches grow in some plants close to the ground and in some plants higher up on the stems. On the basis of height and other characteristics Neem plant is classified as

question_answer56) DIRECTIONS: Read the passage (s) given below and answer the questions that follow. Passage-2 Various parts of a plant are stem, branches, roots, leaves, flowers and fruits. Plants are classified on the basis of differences in their heights, stems and branches. Branches grow in some plants close to the ground and in some plants higher up on the stems. Select the one in which the branches appear higher up on the stem.

question_answer57) DIRECTIONS: Read the passage (s) given below and answer the questions that follow. Passage-2 Various parts of a plant are stem, branches, roots, leaves, flowers and fruits. Plants are classified on the basis of differences in their heights, stems and branches. Branches grow in some plants close to the ground and in some plants higher up on the stems. A plant has green and tender stem. The plant is most likely to belong to which category?

Throughout each season we will see how the types of plants that are available changes, and come to know our landscape better by witnessing subtle shifts. Seasonal learning helps us connect with the plants, our sense of place, and each other. Each lesson will incorporate ethics, history, storytelling, joy, creativity, and pure tomfoolery.

found challenging to get to know about plants when i learn on each and every part of plant. Explanation: Generally, plants contain many single parts which combines to form the whole body plant. We need to know about the activities they perform and features they have to completely know about plant

Hyatt grew up interested in science and plants, and with the encouragement of a fifth grade teacher, she began pursuing her own questions about the natural world, studying a pond at the end of her street. In seventh grade, she was enrolled in the Johns Hopkins Center for Talented Youth, which has been a hotbed for the development of career scientists. By the middle of high school, Hyatt decided on science as a major, and when she got to Smith College, she found botany presented as an exciting experimental field, not the static system of classification with which it is often associated.

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