Question

13. A biologist studied the environmental impact of a herbicide on squirrel reproduction. He
selected two small islands with similar vegetation and similar-sized squirrel populations
(about 200 squirrels) with equal reproductive rates. One island, selected at random, was
sprayed with herbicide, and the other was used as a control. Squirrel reproduction rates were
measured on both islands before and after the treatment. What is the greatest flaw in this
investigation?
a Lack of controls.
b. Lack of replication
c. Lack of randomization
d. Lack of variables​

Answer 1

Answer:

b

is the correct option .

lack of replication.