Ans1. (i) Convex mirror makes diminished and erect image which help the driver of the vehicle to interpret the vehicles coming behind it.
(ii) Convex mirror gives wide range of view to the driver
as you can see below
Ans.2 A mature haploid male or female germ cell which is able to unite with another of the opposite sex in sexual reproduction to form a zygote.
Ans3. NO, but a suitable angle could not be achieved
for example your class slab is placed in water if the incident angle is 30 degrees then it may be 45 degrees with glass slab because water will also refract light
ANS4. no idea boss idon't wanna provide you wrong