Biology Revision Notes For Class 12 Chapter 2 Sexual Reproduction in Flowering Plants

Flowers are the sexual reproductive organs in plants. They are the result of 125 million years of evolution. Today, there are nearly 400,000 species of plants, out of which, 94 per cent are flowering plants. They have dedicated reproductive structures that are grouped into male (Androecium) and female (Gynoecium) parts.

Apart from these structures, flowering plants need external aid to carry the pollen and ovules from place to place. These may include wind, water, insects and other animals. Learn more about sexual reproduction in flowering plants by exploring Biology revision notes chapter 2 – Sexual Reproduction in Flowering Plants.

Biology Revision Notes Class 12 Chapter 2

Biology Revision Notes Class 12 Chapter 2

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Practise This Question

Which of the following statements is/are false?

(I) Urine is hypertonic in distal convoluted tubule.            
(II) When urine passes into the collecting tubule, it becomes hypotonic.
III) Urine is isotonic in proximal convoluted tubule.          
(IV) Urine becomes more and more hypotonic as it passes down the Henle’s loop.