Question 1 Give important features of the double helical model of DNA proposed by Watson and Crick? Question 2 What is a gene? Question 3 Explain XX-XY type of sex determination in human beings? Question 4 Give examples where environmental factors govern the sex determination? Question 5 Define the term homogametic and heterogametic? Question 6 Mention few … [Read more...] about Structure of DNA
Class 10
Mendel’s Contribution
Question 1 Define the term heredity, variations and genetics? Question 2 Why Mendel selected garden pea plant for his experiments? Question 3 Explain the Mendel monohybrid cross? Question 4 Explain the Mendel dihybrid cross? Question 5 Explain the contribution of Mendel in Genetics? Question 6 State law of segregation ? Question 7 State law of independent … [Read more...] about Mendel’s Contribution
Scattering of Light
Question 1 What is meant by scattering of light? Question 2 What is Tyndall effect? Give few examples? Question 3 What happens when a beam of sunlight enters a dusty room through a window? Question 4 Why does the sky appear blue on a clear day? Question 5 Why does sky appear black to an astronaut instead of blue? Question 6 Why does Sun appear red at … [Read more...] about Scattering of Light
Atmospheric Refraction
Question 1 What is atmospheric refraction? Question 2 What causes atmospheric refraction? Question 3 Why the Sun can be seen about two minutes before actual sunrise? Question 4 Explain why if we look at objects through the hot air over a fire, the objects appear to be moving slightly? Question 5 Why do stars twinkle at night in sky? Question 6 Why planets do not … [Read more...] about Atmospheric Refraction
Glass Prism
Question 1 What happens when a ray of light is passed through a triangular glass prism? Question 2 What will happen if another similar glass prism is placed upside down behind the first prism? Question 3 Define the term angle of prism? Question 4 What is spectrum?What is the name of glass shape used to produce a spectrum? Question 5 Write the various colours of … [Read more...] about Glass Prism