Q. What is meant by speciation? list four factors that could lead to speciations. Which of these cannot be a major factor in the speciation of a self-pollinating plant species. Give a reason to justify your answer.
Q. A particle of mass m and charge q is thrown at a speed u against a uniform electric field E. How much distance will it travel before coming to momentary rest?
Q. The contact angle between water and glass is 0^o . When water is poured in a glass to the maximum of its capacity, the water surface is convex upward. The angle of contact in such a situation is more than 90^o . Explain.
Q. Three married couples are to be seated in a row having six seats in a cinema hall. If spouses are to be seated next to each other, in how many ways can they be seated? Find also the number of ways of their seating if all the ladies sit together.
Q. Differentiate between geitonogamy and xenogamy in plants. Which one between the two will lead to inbreeding depression and why?
