What can you conclude is one disadvantage of the arrangement of glucose molecules that gives chitin and cellulose their strength? A) It does not allow for the elimination of wastes and, therefore, causes higher energy use.
B) It makes their structure rigid; therefore they cannot be digested.
C) It does not allow for the accumulation of glycogen and, therefore, increases mobility.
D) It cannot bond with hydrogen and, therefore, creates limitations on height.

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.