List the three basic components required for a bacterial cloning vector and briefly describe the purpose of each.
the haploid human genome contains about 3 × 109 nucleotides. on average, how many dna fragments would be produced if this dna was digested with restriction enzyme psti (a 6-base cutter)? rsai (a 4-base cutter)? how often would an 8-base cutter cleave? 9-2

When mendel crossed a true-breeding short plant with a true-breeding tall plant all the offspring were tall. which term describes the gene for tallnes?

The table presents the average day and night temperatures in five cities. it also reveals whether a city receives substantial rainfall (wet climate) or little rainfall (dry climate). which city’s rocks are likeliest to experience frost wedging, and why? a) city a because the consistently subzero temperature would prevent water from melting b) city b because it is a wet region and the temperature fluctuates around the freezing point c) city c because it receives plenty of rain fall and the weather is moderately cool d) city d because the hot and dry weather would cause rocks to absorb water

Why should organisms reproduce more offspring than will survive? select all that apply.