Sexual Reproduction in Flowering Plants — BIOLOGY STD 12 Science — Question

Name the categories of organisms used as biofertilisers with an example for each. How do they function in organic farming?

How did an American Company, Eli Lilly use the knowledge of rDNA technology to produce human insulin?

Or

How did Eli Lilly synthesise the human insulin? Mention one difference between this insulin and the one produced by the human pancreas.

Or

How did Eli Lilly Company go about preparing the human insulin? How is the insulin thus produced different from that produced by the functional human insulin gene?

Write the names of important microbes used in industries. Name any five products in which microbes are used for manufacturing purpose.

Explain the following diseases in detail.
(a) Haemophilia
(b) Colour blindness
(c) Thalasemia

Why do lepidopterans die when they feed on Bt cotton plant? Explain how does it happen.

From where the fossils of Neanderthal man were found? Also write its characteristics.###Write two characteristics of the mental capacity and lifestyle of Neanderthal humans.

What will be the ploidy of the cells of the nucellus, microspore mother cell, the functional megaspore and female gametophyte?

If implementation of better techniques and new strategies are required to provide more efficient care and assistance to people, then why is there a statutory ban on amniocentesis? Write the use of this technique and give reason to justify.

Explain any three inbreeding devices in flowering plants.

The rate of decomposition of detritus is affected by the abiotic factors like availability of oxygen, pH of the soil substratum, temperature etc. Discuss.