Microbes in Human Welfare. — Bio Zoology STD 12 — Question

Mutation theory was put forth by Hugo de Vries. Based on the experiments in Oenothera Lamarckian (The evening primrose plant).

Which periods of paleozoic era are referred as

1. Age of fishes
2. Invertebrates

When a species is considered as locally extinct?

Give the names of two methods of in-situ conservation.

What are the Genetically Modified Organisms?

List out any four clinical symptoms of Klinefelter’s syndrome.

What are the two major components of prokaryotic RNA polymerase? How do they act?

Chemicals used in agriculture as fertilizer and pesticides are generally called as ________

Identify the mismatched pair and give a reason.
(a) Plague – Yersinia pestis
(b) Filariasis – Wuchereria bancrofti
(c) Dermatomycosis – Trypanosoma gambiense
(d) Common cold – Rhinovirus

What is S – D sequence?