15. Final Synthesis. Describe how a cell that is 'FIXED' can be used to estimate the time spent in the phases of mitosis. Explain the process you used to determine the times for each phase.

Describe the response the kidneys have to dehydration and excessive water intake. what happens to the concentration of urine in each case ?

What are the student's observations and inferences before he starts his investigation?

Embryonic stem cells are cells derived from an embryo. these cells can be used to create new tissues for patients suffering from certain illnesses and disorders. which statement best summarizes why the use of embryonic stem cells could be seen as unethical? a. some people consider embryos to possess rights equal to those of fully developed human beings. b. extracting stem cells from embryos is a very energy-intensive process, which consumes resources that could be used elsewhere. c. embryos are difficult to obtain, so the monetary cost of using them for research outweighs their benefit. d. the process of extracting stem cells from embryos generates biohazardous waste that cannot be safely disposed of.