Plant Growth and Mineral Nutrition — BIOLOGY STD 12 Science — Question

Draw a labelled diagram of a scrubber and mention its use to remove pollutants.

Karnataka, Chanda, Khasi, Rajasthan, Sarguja, Jaintia, Maharashtra, Bastar.

Region	Sacred groves seen at
(1) Meghalaya	____________________
(2) Western ghat regions	____________________
(3) Aravali hills	___________________
(4) Madhya Pradesh	___________________

What is splicing? Why is splicing necessary in eukaryotic genes?

Differentiate between the roles of B-lymphocytes and T-lymphocytes in generating immune response.

Explain:

1. Stratification.
2. Leaching.

What do oral pills contain and how do they act as effective contraceptives?OR
Name the hormonal composition of the oral contraceptive used by human females. Explain how does it act as contraceptive?

Both haemophilia and thalassemia are blood related disorders in humans. Write their causes and the difference between the two. Name the category of genetic disorder they both come under.

Give the floral adaptations for chiropterophily.

If a marine fish is placed in a fresh water aquarium, will the fish be able to survive? Why or why not?

Is it possible to achieve ‘zero population growth rate’? If yes, what kind of age pyramid is obtained?