Describe professor kwang jeon’s observations of the amoebas and bacteria and explain how this relates to endosymbiotic theory.

Rue or false siblings look simila rbecause they each have some traits of their parents.

Why are scientists concerned about the depletion of the ozone levels in the stratosphere?

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.