The chart below shows the percent change in mass of eggs in various salt solutions over a 1 hr period. By looking at the trajectory of the lines, you can tell if there was more or less salt in the egg in comparison to the solution based on whether water move out (it decreased in mass), or if water moved in (it gained mass). Based on the diagram, what percentage of salt is closest to the salt concentration in the egg, given the various lines for each percentage solution the egg was placed into?

Given the RAAS diagram below, what change causes blood volume to increase in this pathway?

Use the options to correctly identify the structures in the urinary system:  

In the image below, the top portion shows the onions cells under normal conditions, the bottom portion of the image shows the cells when placed into a high 15% salt solution. Is the solution hyper, hypo, or isotonic to the onion cells?

How many nephrons are in the human body in one kidney?

In a study of communication of snails, a researcher obtained the following data regarding coincidence indices of trail following  (n = 25 snail pairs per treatment) What do these data tell us about feeding conditions/species identification of snails?  (3 pts)    Treatment Paired t-test results Starved pond following well fed vs starved snails p = 0.064                                                       mean CI starved following fed: 0.503                    mean CI starved following starved: 0.125 Fed pond snail following fed Ramshorn or fed pond snail   p = 0.003 mean CI fed pond following fed pond: 0.806 mean CI fed pond following fed Ramhorn: 0.089

Darwin developed the theory of sexual selection to help explain:

If the process of denitrification in the nitrogen cycle stopped completely, what would most likely happen?

A conservation biologist is studying a population of an endangered bird species in a forest. She conducts a population count to estimate the total number of individuals. Why is this population count important for her study?

The nurse should make sure that a client’s dentures are removed in which clinical situations? Select all that apply.