Which of the following is not true of a codon? a) it consists of three nucleotides. b) it may code for the same amino acid as another codon. c) it never codes for more than one amino acid. d) it extends from one end of a trna molecule. e) it is the basic unit of the genetic code.

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.

The ancestors of plants that lived in water had plenty of water for the young. angiosperms are a group of land plants that evolved a reproductive trait for living on land. this trait protect young plants by allowing them to grow only when water is present and the conditions for healthy development are right. what trait most likely young angiosperms in this way?

This is the interaction of two organisms where one is and the other is neither nor harmed.