The "highly specific molecular scissors" that cut dna into fragments are called

This "highly specific molecular scissors" refers to an enzyme called "restriction enzyme" or "restriction endonuclease". Restriction endonuclease are enzymes that function to recognize specific sequences then makes a cut near those sequences. After the cut is made, then it will be joined to another sequence by the enzyme DNA ligase. Usually, restriction enzymes are found in bacterial cells as bacterial cells have restriction sites.

Gravitational force i believe

It would be c. because they are the same species. the definition for genus is a principal taxonomic category that ranks above species and below family, and is denoted by a capitalized latin name