10. the diagram below illustrates the release of
chemical a from a human cell in response to a
specific stimulus.
stimulus
humari cell
- chemical a
source: biology 8th ed., pearson 2008, p-859.
which cell structure plays a direct role in the release
of this chemical from the cell?
(1) nucleus
(2) ribosome
(3) chloroplast
(4) cell membrane

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

Compare the parts of a cell and the cell as a whole to another common nonliving system (i. e., a car, a city, describe the parts of a cell and their primary function.

The wind speed in the region between cities a and b was probably the greatest at noon on which day