Questions

Acceleration due to gravity is not the same in all parts of the earth.

Differentiate: mass and weight

Differentiate: Gravitational constant G and acceleration due to gravity

In a survey of 300 people, it was found that 150 people like iPhones and 200 people like Android phones. But 25 people did not like any of these two phones.

1. If I and A denote the sets of people who like iPhone and Android Phones respectively, write the cardinality of $\rm n \overline {( I \cup A ) }$.
2. Present the above information in a Venn diagram.
3. Find the number of people who like iPhones only.
4. Compare the number of people who like both iPhone and Android phones and who do not like any of these two phones.

Meiotic cell division brings variation. How?

Sexual reproduction is impossible without meiotic cell division. Why?

Mitotic cell division is also called equational cell division. Why?

Meiotic cell division is also called reductional cell division. Why?

Though males have both X and Y chromosomes, some of them have only male or only female kids. Why?

The male has a main role in the determination of sex. Give reason.