Which major sports associations are most popular among females? nascar and nfl nhl and nfl mlb and nfl nfl and nascar?

Explain how paleontologists use trilobite fossils as index fossils for various geologic time periods.

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

The cell membrane controls what enters and leaves the cell. which of the structures in the diagram below is the cell membrane? — f оооо