you discover a certain species of weed growing in soil contaminated with toxic pcbs, and later determine that the pcb resistance is due to a single dominant allele (r) and only the seeds with genotype r_ will germinate and survive. if 19% of the seeds from a randomly mating population of resistant weeds will germinate in contaminated soil, what is the frequency of the R allele

What is the phylum of soft bodied animals with a true bosy cavity and a three part body consisting of a foot visceral mass and a mantle

Plz fast biotechnology is a growing field of applied biology. many crops such as corn have been engineered to be resistant to herbicides. therefore farmers can spray these chemicals to kill weeds growing near the crop without worries of killing the crop itself how does this type of biotechnology work? a. by changing the genetic make up of the crops. b. by causing the crops to kill the weeds. c. by changing the type of crops used. d. by changing the location of the crops.

Read each description below and determine to which stage of sleep each pertains. then click and drag each box into the appropriate category below.