Which of the following describes a symbiotic relationship? a Owl and field mouse b Oak tree and pine tree c Spider and fly d Shark and remora fish

Describe two recent or ongoing space missions.

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