Posts

Showing posts with the label class 11

Featured post

ANATOMY OF FLOWERING PLANTS

-
Image
  What is Plant Anatomy? Plant anatomy is the study of internal structure and organization of tissues in plants. It helps in understanding: Functional adaptation Transport system Growth patterns Tissue Organization in Flowering Plants Flowering plants have three major tissue systems :  Epidermal Tissue System Components: Epidermis Single layer of compact cells No intercellular spaces Covered by cuticle (except roots) Cuticle Made of cutin Prevents water loss Stomata Present mainly on leaves Composed of guard cells Regulate: Gas exchange Transpiration Root hairs Extensions of epidermal cells Increase surface area for absorption Trichomes (in stem) Hair-like structures Protection + reduce transpiration  Functions: Protection Water conservation Gas exchange 🌿 B. Ground Tissue System  Types of Ground Tissue: 1. Parenchyma Living cells, thin cell wall Large vacuole Functions: Storage Photosynthesis ( chlorenchyma ) Air storage ( aerenchyma ) 2. Collenchyma Living cell...
Post a Comment
Read more

MORPHOLOGY OF FLOWERING PLANTS NOTES

-
Image
 The wide range in the structure of higher plants is fascinating, particularly the diversity found in angiosperms. Despite the large diversity in external structure or morphology, all angiosperms share certain characteristics: roots, stems, leaves, flowers, and fruits. Standard technical terms and definitions are essential for successful classification and understanding of higher plants and other living organisms. Variations in different plant parts are often adaptations to their environment, such as adaptations to various habitats, protection, climbing, or storage. When pulling out any weed, you will observe that they all have roots, stems, and leaves. Some may also bear flowers and fruits. The underground part of a flowering plant is known as the root system, while the portion above the ground is called the shoot system. 5.1 THE ROOT In dicotyledonous plants, the radicle directly elongates to form the primary root, which grows into the soil. This primary root gives rise to latera...
Post a Comment
Read more

ANIMAL KINGDOM

-
Image
 4.1 BASIS OF CLASSIFICATION 4.1.1 Levels of Organization the cellular level of organization: Seen in sponges (Porifera). Cells are arranged as loose aggregates. Some division of labor occurs among the cells. Tissue level of organization: Seen in coelenterates (Cnidaria) and some other animals. Cells performing similar functions are arranged into tissues. Tissues are specialized for specific functions. Organ level of organization: Seen in higher phyla like Platyhelminthes (flatworms) and others. Tissues are grouped together to form organs. Organs are specialized for specific functions. Organ system level of organization : Seen in annelids (segmented worms), arthropods (insects, crustaceans), mollusks (snails, clams), echinoderms (starfish), and chordates (vertebrates). Organs are associated to form functional systems. Each organ system is concerned with a specific physiological function. Patterns of complexity in organ systems: Digestive system: Varies in complexity. Platyhelminthe...
Post a Comment
Read more