In one hypothesis about the origin of life on earth, scientists propose that organic molecules were produced from inorganic molecules in chemical reactions. how would you evaluate a scientist's claim that reactions, showing organic molecules emerging from inorganic molecules, can be seen in nature today? ( 2 points)
a
the claim must be false because modern-day evolution cannot be observed and recorded.
b
the claim is likely to be false because the current conditions on earth are opposed to the formation of life.
c
the claim is likely to be true because all the elements necessary for the formation of organic molecules are present on earth.
d
the claim must be true because scientists are able to replicate these reactions in a lab.

In a cladogram' when does a group of organisms branch off

24. how are vaccines used to keep people healthy?

Which of the following statements is correct in hour our immune system responds to a potential pathogen? a. the adapted immune system will call on the innate immune system to destroy the pathogen. b. b cells will start reading the antigen code immediately and call t cells to assist in destroying the pathogen. c. the skin will be the first line of defense, and then the many phagocytes in the bloodstream will attempt to consume the possible pathogen. d. the t-cells in the adapted immune systems are the first to recognize the pathogen vaccines are weakened forms of disease causing microorganisms, which are given to patients to prevent disease. after the vaccine is administered, the immune system responds by creating a(n) to recognize the a. antigen, antibody b. antibody, antigen c. antibody, antibiotic d. antibiotic, antibody