study the four statements (A-D) given below and select the two correct ones out of them
(A) Definition of biological soecies was given by Ernst mayr
(B) photoperiod does not affect reproduction in plants
© Binomial nomenclature system was given by Ernst Whittaker
(D) In unicellular organisms, reproduction is synonymous with growth
The two correct statments are
A. a and d
B. a and b
C. b and c
D. c and d
