Pliz answer my question, start from Qno:15

15 -differences between gymnosperms and angiosperms:

In gymnosperms ovules are exposed but in angiosperm ovules are enclosed in ovary.In angiosperm seeds are enclosed inside the fruits but in gymnosperm seeds are not enclosed inside the fruits.Gymnosperm bear cones instead of flowers but angiosperm bear well developed flowers.

16-

They have mammary glands.Their body is covered with hai.Breathing takes place through lungs.

17- Uniform acceleration is a change of equal velocity in equal interval of tine.

Non- Uniform acceleration is a change of unequal velocity in equal interval of time.

18- Three equation of motion:

v =u+ats=ut+1/2at^2v^2 = u^2+ 2as Hope this helps!!!

I’m not absolutely sure but i think it’s 7x6x5x4x3x2=5040 because as the first character you can take any of the 7 given then you are left with 5 then 6 then 4 etc.