Molecular Basis of Inheritance — BIOLOGY STD 12 Science — Question

A population of Paramoecium caudatum was grown in a culture medium. After 5 days the culture medium became overcrowed with Paramoeium and had depleted nutrients. What will happen to the population and what type of growth curve will the population attain? Draw the growth curve.

Define Niche.

Explain the term implantation. After which event does it takes place?

1. Draw schematic diagrams of segments of a vector and a foreign DNA with the sequence of nucleotides recognised by EcoRI.
2. Draw the vector DNA segment and foreign DNA segment after the action of EcoRI and label the sticky ends produced.

Give reason : Patent jointly issued by Delta and Pineland Company and U. S. department of agriculture under the title ‘control of plant gene expression’ was not granted by Indian government.

1. List the two methodologies which were involved in human genome project. Mention how they were used.
2. Expand ‘YAC’ and mention what was it used for.

Differentiate between primary and secondary succession. Provide one example of each.

Give scientific : Pituitary may be considered as the coordinator of endocrine orchestra but not master endocrine gland.

List three strategies that a bisexual flower can evolve to prevent self – pollination.

Why should biodiversity be conserved? Explain giving three reasons.