Question

A protozoan reproduces by binary fission. What will be the number of
protozoans in its population after six generations?
a. 128
b. 24
c. 64
d. 32


NCERT Class XII
Biology - Main Course Book

Chapter 13. Organisms and Popolations

Answer 1

option c. 64

one generation 1:  there are 2 protozoans.
in generation  2:    there are  2 * 2 = 4 in total
in generation 3:    there are  4*2 = 8 in total
in generation 4:    in total  16 are there
in generation  5:   32
in generation 6 :   there are 64