(a)[3]
Complete the definition of the term adaptive feature by inserting the missing words. An adaptive feature is an [BLANK] feature that enables an organism to [BLANK] and reproduce in its [BLANK].
(b(i))[1]
State the range with the greatest frequency for flagellum length.
(b(ii))[1]
State the frequency of sperm whose flagellum length lies between 4.8 µm and 4.9 µm.
(b(iii))[1]
State the kind of variation shown by flagellum length.
(c)[1]
Suggest a reason for this.
(d)[1]
State the name of the organ where sperm are made.