What conclusion can be made if two or more organisms look similar during development? A. They share a common ancestor from long ago.
B. They have evolved from each other over time.
C. The traits are just a random occurrence.
D. The organisms evolved at the same time.

Four types of motile cells in human body?

In the water cycle , when does water undergo a chemical change

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.