True or false?
__2 parents that are heterozygous for type a blood could have offspring with type o.
__2 parents that are type ab could have offspring that are type o.
__one parent who is type ab and one who is heterozygous type b could have offspring w/ type a, b, and o.

Blood that runs in a human body is categorized into 3 types namely the A, B and the O depending upon the blood in their parents. The O blood is recessive and thereby it gets expressed only if both the parents have O group.

d. planting trees

the trees take in carbon to make oxygen.

d we did this already