Some cats will lick Vaseline off a spoon. Or, if you smear it on the cat's nose or front leg below the elbow, she'll lick it off. Some cats will also eat Vaseline mixed into tuna.ome cats will lick Vaseline off a spoon. Or, if you smear it on the cat's nose or front leg below the elbow, she'll lick it off. Some cats will also eat Vaseline mixed into tuna.
Concept 17 A gene is made of DNA. In the 1920s, experiments showed that a harmless strain of bacteria can become infectious when mixed with a virulent strain of bacteria that had been killed. The dead bacteria apparently provide some chemical that transforms the harmless bacteria to infectious ones.
The blueprints are in DNA. DNA is made of  nucleotides. Each nucleotide containsâ¦ a phophate molecule, a sugar,  and one of four bases. The sequence of the four bases determines  each genetic code. Some examples of genetics are freckles, dimples,  and a cleft chin.