Which of the following is an advantage of using embryonic stem cells in
medical research?
o
a. the use of embryonic stem cells is much less expensive than the
use of adult stem cells.
o
b. no living tissue is damaged when scientists use embryonic stem
cells.
o
c. there is no controversy surrounding the use of embryonic stem
cells.
d. embryonic stem cells are able to differentiate into a wider range of
cells than adult stem cells.

Dr. kaylan is an ecologist who studies bird behavior. she sets up an experiment to test which type of food crows are most likely to eat when given a choice between walnuts, corn, and sunflower seeds. to perform her experiment, dr. kaylan places three food bins in an area frequented by cows. each bin contains one of the three food types. then, she measures how much of each food type is eaten every day for a month and summarizes the results of her experiment in the pie chart below. based on her results, dr. kaylan concludes that crows choose to eat corn more frequently than other food sources because it has a higher nutritional value. what is a reasonable alternate conclusion that can be drawn from dr. kaylan's data

What type of competition exsist between two species. turtles and fish

Which statement best describes how the loudness of the sound affects the high-pressure region created by the sound wave? a. a louder sound has no effect on the pressure created. b. a louder sound means a high-pressure region that is higher. c. a louder sound means a high-pressure region that is not as high.