×

Learnhive Sign Up


By clicking on the above button you confirm that you are at least 13 years old and agree to our Terms of Service & Privacy Policy.
Already have a Learnhive account?
×

Biology / Flowering plants

Biology / Flowering plants

Living things give birth to young ones by the process called reproduction.
Plants reproduce in two ways Asexual reproduction by - budding, spore formation, fragmentation.
Vegetative reproduction (vegetative part give rise to new ones) through leaf or stem or root
Artificial vegetative propagation- growing plants using artificial methods such as cutting, layering and grafting. Tissue culture is a modern method of vegetative reproduction.
Sexual reproduction - Flower is the reproductive part of a plant.
Flowers are classified based on the shape and symmetry as actinomorphic, zygomorphic and asymmetrical.
Male part of flower is stamen - filament, anther. Anthers have pollen grains, which are the male sex cells.
Female part of a flower is pistil - It has ovary, ovules, style, stigma. Ovules contain egg cell (placenta). The arrangement of placentae within the ovary is termed as placentation.
Also learn about types of gynoecium - Apocarpous and syncarpous.
You might have observed some stalks bare only a single flower while others have two or more? The arrangement of the flowers is also different. The arrangement of flowers on their floral axis is known as infloroscence. Lets have a look on types of inflorescence such as racemose(ex-coriander flower) and cymose(ex- jasmine flowers).

Modern methods of growing plants:
Hybridization - Its a technique of plant breeding to bring about crop improvement and its benefits.
Micropropagation-culturing cells in a culture medium. Learn about its uses and limitations.

Germination of seeds: You know the life of a plant starts with seed. It matures and gets enclosed in a fruit. You will learn about the seed types as monocot(single cotyledon) and dicot(two cotyledons).
The Seed then germinates under favourable conditions like air, water, and optimum temperature . Germination may be either epigel or hypogel germination.
Epigeal - cotyledons come above the surface of the soil
hypogeal - seed remains inside the soil

  • Transportation in Plants: Transportation of water and food take place by xylem(water) and phloem(food) through diffusion and osmosis.
  • Absorption by roots : Roots play an important role in absorption of water and minerals from the soil, which is conducted to all parts of the plant body through xylem.
  • Learn about the processes and their significance involved in absorption and conduction of water like
          1) imbibition,
          2) diffusion,
          3) osmosis,
          4) plasmolysis and
          5) turgidity.
  • Transpiration: Loss of water, in the form of water vapour is called transpiration.
         --Learn different experiments showing transpiration in plants.
         --Transpiration can be measured by weighing methods and Ganong's photometer. The types of transpiration are : Stomatal (through leaves) , lenticular (through roots) and cuticular (through cuticle).
  • Photosynthesis: This module focuses on mechanism of photosynthesis.
    Processes of photosynthesis-;
          1)Light reaction: It takes place only in presence of light and occurs in grana region of plastids.
          2)Dark reaction - It is independent of light and occurs in stroma region of plastids. Also learn about the factors affecting photosynthesis.

Exercises
Topics
Exercises
Topics
  • Plant Structure and Function - SmartTest

    SmartTest on Plant Structure and Function

    • Questions: 10

    Transport in plants - SmartTest

    SmartTest on Transport in plants

    • Questions: 10

    Reproduction in flowering plants - SmartTest

    SmartTest on Reproduction in flowering plants

    • Questions: 10
    • Plant structure and function
    • Transport in plants
    • Reproduction in flowering plants
    • Asexual reproduction and cloning in plants

×

×

×

Learnhive Login

Some message