Which of the following is true about viruses? a. a virus is a type of primitive bacteria cell. b. no virus is harmful to the cell it infects. c. no virus contains dna or rna. d. a virus must enter a living cell to make copies of itself.

In tomato plants, mendel found that the allele for smooth seeds (s) is dominant, while the allele for wrinkled seeds (s) is recessive. which of these punnett squares shows crosses between two plants heterozygous for smooth seeds? i need this to be answered as soon as ! sry the picture is bad quality

About how much of the cell mass is watet

Which statement best describes how the nucleus, the rough endoplasmic reticulum, and ribosomes interact during protein synthesis?