Principles of Inheritance and Variation — BIOLOGY STD 12 Science — Question

Write the difference between Darwinism and De Vries theory about evolution of life on earth.

What are biopesticides? Give the scientific name and the use of the first commercially used biopesticide in the world.

Identify the odd one out in each of the following sets:

1. Rete testis, vas deferens, isthmus, epididymis.
2. Seminal vesicles, ampulla, prostate, bulbourethral glands.

Which three options could be thought for increasing food production?

Describe how do 'flocs' and 'activated sludge' help in Sewage Treatment.

Explain Gause's Competitive Exclusion Principle with the help of a suitable example.

Match the Government initiatives to reduce pollution in Column I with the year in which they into effect in Column II.

S.No.	Column I	S.No.	Column II
A.	Air (Prevention and control of Pollution) Act	i.	1974
B.	Joint Forest Management water	ii.	1986
C.	Water (Prevention and Control Pollution)	iii.	1980
D.	Environment (Protection) Act	iv.	1981

What is mutation? What is its significance in the biological world? Name any two agents that induce mutation.

Explain: Population density

Apart from plants and animals, microbes form a permanent biotic component in an ecosystem. While plants have been referred to as autotrophs and animals as heterotrophs, what are microbes referred to as? How do the microbes fulfil their energy requirements?