Biodiversity and Conservation — BIOLOGY STD 12 Science — Question

Why are blue green algae not popular as biofertilisers?

Why do people living in high altitude have more haemoglobin/ high RBC count?

Name the physical processes employed in the primary treatment of sewage.

A mother of one year old daughter wanted to space her second child. TO SIO boni Her doctor suggested CuT. Explain its contraceptive actions.

What is the site of maturation of T-lymphocytes?

Name the type of interaction seen between whale and the barnacles growing on its back?

The Amazon rain forest is referred to as the lungs of the planet'. Mention any one human activity which causes loss of biodiversity in this region.

Write the names of two main groups of cells required to achieve specific immunity.

How will the field be affected by the increase in population of algae like Nostoc and Anabaena in water logged field? Explain the reason