Molecular Basis of Inheritance — BIOLOGY STD 12 Science — Question

Name the ship in which Charles Darwin made his voyage. What was his conclusion about the life forms he observed?

Differentiate between codons and anticodons.

Give diagrammatic representation of decomposition cycle in a terrestrial ecosystem.

What is meant by monosporic development of female gametophyte?

From what you have learnt, can you tell whether enzymes are bigger or DNA is bigger in molecular size? How did you know?

Explain the function of Agrobacterium tumifaciens in gene cloning.

In an experiment, the slope of regression (Z) is 0.2 and in another experiment the value obtained is 1.2. Explain the two situations in respect of species area relationships.

What happens when chromatids fail to segregate during cell division cycle? Explain your answer with an example.

When and where do chorionic villi appear in humans? State their functions.

How many cellular nuclei does the pollen tube of angiosperm have? What is the ploidy of each of the nuclei?