HSC Science (General) इयत्ता १२ वी - Maharashtra State Board Important Questions

Visit of a veterinary doctor to dairy farm is mandatory. Give reasons.

Give the economic importance of ‘fisheries’

Name the high-yielding semi-dwarf varieties of wheat selected and introduced in India in 1963.

Sketch and label 'tubular tower fermenter'.

With the help of a neat and labelled diagram explain VAM (vesicular arbuscular mycorrhizae).

What is 'tissue culture'?

Describe the methodology of tissue culture.

In____________ , superior males of one breed are mated with superior females of another breed.

1. out crossing
2. cross breeding
3. out breeding
4. inbreeding

Give 'two' varieties of silk which are considered  as inferior quality

Trichoderma konigi is a source of _______ enzyme.

(A) invertase

(B) lipase

(C) pectinase

(D) cellulase

Edible fruiting bodies are produced by _______.

Give reason :
Emasculation is done in a flower which is selected as female parent.

Explain the role of microbes in sewage treatment.

Which steps would you follow to develop a new variety of crop plant by selective breeding?

Mention any ‘two’ methods used to prevent spoilage of fish

In Brassica (rapeseed, mustard)........................ varietys is resistant to Aphids.

(a) Pusa A-4
(b) Pusa Gaurav
(c) Pusa Sawni
(d) . Pusa Shubra

The antibiotic chloromycetin is obtained from ______.

R. Q. for proteins is about .......................

(a) 0.7

(b) 0.8

(c) 0.9

(d) 1.0

Give an example of the non-edible or poisonous mushroom, studied by you.

Name the secondary metabolites in Catharanthus roseus.