Year: 2017
Topic: Evolution
Time :
1.
Artificial selection to obtain cows yielding higher milk output represents
(1). Stabilizing ; followed by disruptive as it stabilizes the population to produce higher yielding cows .
(2). Stabilizing ; selection as it stabilizes this character in the population .
(3). Directional ; as it pushes the mean of the character in one direction .
(4). Disruptive ; as it splits the population into two , one yielding higher output and the other lower output .