Amale red winged blackbird has a bright red patch on its shoulder this adaptation increases its chance of mating with the female blackbird some of the birds underwent mutation and their offspring didn’t have the red colored patch individuals with the mutation have chance of being sexually selected a) no b) a lower c) the same d) a higher

your answer is a

step-by-step explanation:

plzplzplzplzplz mark brainliest i need it.

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional