256 heartbeats in 4 minutes, wight the unit rate

64/1 or 64 heartbeats in 1 minute

Step-by-step explanation:

256 divided by 4 is 64.

I hope this helped!!

homozygous. one is homozygous, while two is heterozygous.

in the attachment.   i didn't see your choices.   the word which means there is choices.

step-by-step explanation:

(x,y)

x tells you how much left or right you go from the origin

y tells you how much down or up you go from the origin

so for example (-3,2), you go left 3 and up twice. i denoted which of the ordered pairs is which in my graph.