If a man knows he is heterozygous for type "A" blood and his wife is
heterozygous for type "B" blood... What blood types could we expect to
see in their children?

The child could be A+, B+, AB+, or even O+. It depends on the father and mother whether they are heterozygous A /B+ or homozygous A/B+ respectively

The virus is considered to be are living item since they have hereditary material dnas or rnas. they can imitate and change. they respond to boosts, for example, radiation, chemicals, and warmth. they have antigenic properties. they are proficient to duplicate with a same hereditary constituent.