How many cellular nuclei do the pollen tube of angiosperm have? What is the ploidy of each of the nuclei?

How many nuclei do form male gametoyptes in angiosperms.

Movement in pollen tubes in angiosperms is:

How many celled embryo sac is seen among angiosperms.

How many factors does 210 have ?

How many diagonals can an n-gon (a polygon with n sides ) have ?

Consider the following statements. (i) Polyspermy may bring about fertilisation of egg by more than one male nucleus or the supernumerary sperms may fertilise other components of embryo sac much as synergids or antipodals. (ii) In angiosperms, pollen tube is normally an unbranched structure which ususally persists after fertilisation. (iii) Intine is the inner, pectocellulosic layer of pollen grain wall which is destroyed during acetolysis. (iv) Exine layer of pollen grain comprises of an outer non-sculptured layer sexine and an inner sculptured layer tectum. Which of the following combinations of above given statements is correct ?