You want to determine which part of a plant is actually sensitive to light for phototropism. which of the following would be a good first experiment? a.) shine the light from on side only. then measure the auxin diffusing down the stem on the light areas. b.) remove the apical tip and apply auxin before beginning light treatments. c.) cover one part (for instance, the tip or base) before begging light treatments.

The terrestrial planets are characterized by having a a.) silicate core b.) iron-rich silicate core c.) iron-rich metallic core d.) none of these

The hershey and chase experiments involved the preparation of two different types of radioactively labeled phage. which of the following best explains why two preparations were required? a. the bacteriophage used in the experiments was a t2 phage. b. it was necessary that each of the two phage components, dna and protein, be identifiable upon recovery at the end of the experiment. c. each scientist had his own method for labeling phage, so each conducted the same experiment using a different isotope. d. establishing the identity of the genetic material required observation of two phage generations.

Approximately how many times does an average human heart beat in a lifetime?