Organisms such as bacteria usually reproduce asexually. This means that their cells simply copy their DNA and when the cells divide in two, each new cell receives a copy of the DNA. Yet
bacteria evolve over time. How can that happen?

Variation

Negative Mutations

Neutral Mutations

Positive Mutations

Environmental differences within ecosystems are generally caused by

16. which of the following accurately describes a step within transcription? a. dna polymerase uses one strand of rna as a template to put together nucleotides. b. the dna strand is used as a template for which a complementary rna strand can be produced. c. the rna strand forms a template by which dna can be built. d. the rna strand is produced within the cytoplasm.

Draw the farm's ppf for corn and beef. draw a point that shows an inefficient combination of corn and beef. label ita. draw a point that shows an unattainable combination of corn and beef. label itb. draw a point that shows an efficient combination of corn and beef. label itc.