HSC Science (General) १२ वीं कक्षा - Maharashtra State Board Question Bank Solutions

Adsorption of water by hydrophilic colloids is called______.

Why do the wooden doors become very hard to close and open in rainy season?

Give a scientific reason:

The pyramid of energy is always upright.

Describe pyramid of energy with the help of diagram.

Explain ‘Carbon cycle’.

Explain the carbon cycle with the help of a simplified model.

Write important features of a sedimentary cycle in an ecosystem.

Give the principles of Darwin's theory of natural selection.

Objection to Darwin's theory of natural selection.

Guano deposits are rich in ______.

What is vaccine?

All organisms produce more young ones. Comment

Define the term:

Plasmolysis

Define the following:    
Implantation

Answer each question in ‘One’ sentence only: 

Identify which one of the following is a test cross. 

The abundance of phosphate, causing algal overgrowth resulting in depletion of oxygen and killing other aquatic life is known as --------------------------. 

Name any ‘two’ edible varieties of mushrooms. Give nutritional values of these. 

Wheat variety 'Atlas 66' is improved for ______.

Define the cohesive force.

Which mineral acts as a limiting factor for productivity in an aquatic ecosystem.