Make a personal spider repellent to repel spiders and ticks. To make the personal repellent, mix 1 tsp. of essential lavender oil with 8 oz. of your favorite sunscreen, face lotion, body lotion or aloe vera gel. Shake the mixture well to combine the ingredients. Slather it on your skin as often as desired.
| Share | Cite. virus, parasite with a noncellular structure composed mainly of nucleic acid within a protein coat. Most viruses are too small (100â2,000 Angstrom units) to be seen with the light microscope and thus must be studied by electron microscopes. Share | Cite. virus, parasite with a noncellular structure composed mainly of nucleic acid within a protein coat. Most viruses are too small (100â2,000 Angstrom units) to be seen with the light microscope and thus must be studied by electron microscopes.
The Nature of Viruses Viral Structure All viruses have the same basic struc-ture: a core of nucleic acid surroundedby protein. Individual viruses containonly a single type of nucleic acid, eitherDNA or RNA.The DNA or RNAgenome may be linear or circular, andsingle-stranded or double-stranded.Viruses are frequently classified by thenature of their genomes. RNA-basedviruses are known as retroviruses.he first virus to be isolatedproved to consist of two chemicals, one a protein and theother a nucleic acid. The Nature of Viruses. Viruses occur in all organisms.Able to reproduce only within living cells, viruses are notthemselves alive.