Do snow have a smell?

Ahypothesis that has been tested again and again , with similar results each time may become a law , true or false

Cells destroy body cells infected by a virus or bacteria.

Match the following items 1. rr 2. rr 3. identical alleles 4. unlike alleles 5. rr ()homozygous, recessive ()homozygous definition ()heterozygous, dominant cell ()heterozygous definition () homozygous, dominant cell