Why is a food chain a more limited representation of the flow of energy through an ecosystem than a food web?
a.
a food chain has limitations with the organisms involved.
b.
a food chain shows only a single pathway of energy.
c.
a food chain shows multiple pathways of energy.
d.
a food chain shows all the organisms.

Which of the following is a true statement? question 8 options: populations can't evolve, only individual organisms. individuals have adaptations that can change over time. individuals have traits that may or may not make them successful at reproduction. individuals evolve to have adaptations.

Which of the following is the sl unit used to measure temperature a. kilogram b. liter c. meter d. kelvin

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.