One of the most accurate ways of determining evolutionary relationships is looking at differences in biological molecules. Which of the following molecules could be used? Lipids
Carbohydrates
DNA and proteins
All of the above​

When listening the levels of orginization in orginisims from the smallest to most complex , which level is just below organs in complexity

2. which of the following statements does not accurately describe stem cells? a. embryonic stem cells make up the inner cell mass of a blastocyst. b. with more research, stem cells may be used to repair or replace damaged cells. c. the use of stem cells is without any objections since it can be used in therapies to humans. d. adult stem cells are multipotent and can differentiate into many types of cells.

24. how are vaccines used to keep people healthy?