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.

(drag each tile to the correct identify which questions can be answered by what can be answered by science or which cannot. -is it right or wrong to use genetic engineering to produce new food products? -what are the most common social settings that tend to produce accomplished artists? -if a new gene is added to the genome of a tomato species, will that species be more resistant to insects? -should humans use biotechnology to bring extinct organisms from the fossil record back to life? -do the types of organisms found in the fossil record appear in consistent sequences in different parts of the world? -are michelangelo's paintings more impressive than rembrandt's?

The finches on the galapagos island were similar in form except for variations of their beaks. darwin observed that these variations were useful for: attracting a mate defending territory building nests gathering food

Apaleontologist finds a plant fossil that shows that the plant had seeds. what can the paleontologist conclude?