Human Reproduction — BIOLOGY STD 12 Science — Question

Discuss briefly the technology that made us self-sufficient in food production.

Name two drugs obtained from poppy plant. “These drugs are medically useful, but are often abused.' Taking the mentioned examples, justify by giving reasons.
OR
How are morphine and heroin related? Mention the effect each one of them has on the human body.

How does the floral pattern of Mediterranean orchid Ophrys guarantee cross pollination?

How and why is the bacterium Thermus aquaticus employed in DNA technology? Explain.
Or
Name the source of the DNA polymerase used in PCR technique. Mention why it is used?

Or
Give the name of the organism from where the thermostable DNA polymerase is isolated. State its role in genetic engineering.

Give the binomials of two types of yeast and the commercial bioactive products they help to produce.

Give any two similarities between the behaviour of genes (Mendel's factors) during inheritance and of chromosomes during cell division.

What is puffed up appearance of Idli/ Dosa due to which metabolic pathway is involved in it?

Why is human ABO blood group gene considered a good example of multiple alleles?

In a cross between two tall pea plants, some of the offsprings produced were dwarf. Show with the help of Punnett square how this is possible.

Water lily is an aquatic plant, yet it shows entomophily. Why?