The labels for ten bacterial strains were mixed up and now you do not know the identity of each strain. you know all strains are auxotrophs and each one has a single, unique mutation. you set up pairwise crosses between bacterial strains and select for exconjugants by plating on mm. use the information below to determine f-, f+, and hfr strains. (- means no colonies grow on mm after conjugation, + means few colonies, +++ means many colonies) explain why f- strains: a1, a2, b5 f+ strains: a3, a4, b3, b4 and hfr strains: b1, b2, a5 b1b2b3b4b5 a1- a2- + + +++ f- strains: f+ strains: hfr strains:

One statements is an example of a scientific observation. another statement is an example of a scientific explanation. identify the correct statement for each category to illustrate how scientific explanations are inferred from scientific observations.

1. -define adaptation2 explain darwin's theories of descent with modification and natural selection in detail3. -explain how each of these provides evidence for evolution: a. -fossil record, including superposition and transitional fossilsb-anatomy, including homologous structuresc-biological molecules, including dna and proteins4. -explain the difference between convergent and divergent evolution.5. -define and give three examples of artificial selection6. -define and give one example of coevolution.7. -explain biodiversity and how it benefits humans.8. -explain a type of population lest affected by environmental change.

We all have different forms of genes from our parent(s).what are these different forms called? a. alleles b. characters c. dna d. resources