Katie wants to see if apples that are kept cold will rot or stay edible. She places an apple in the refrigerator and records the date. What should she use as a control? (a) Keep an apple in freezer

(b) Keep an apple in boiling water

(c) Keep an apple in cool place

(d) Keep an apple in warm place

Which best explains why viruses do not have special structures or enzymes that allow them to make their own food? viruses can use energy in living cells that they infect. viruses can replicate inside a host that they infect. viruses can cause contagious illnesses in host cells. viruses integrate their rna or dna into infected cells.

Plz genetic engineering can be applied to many fields including medicine and agriculture. which of the following is a medical application of genetic engineering? a. giving crop plants recombinant dna so that they would be resistant to herbicides. b. examining a persons pedigree to determine whether they can carry a gene for a genetic disease. c. analyzing a persons dna to see how closely they are related to another person. d. certain genes into bacteria so that they will produce a needed medicine.

One of the purposes of transcription is to produce a sequence of bases that