Carol and joseph have freckles and curly red hair. all of their children, except one, also have freckles and curly red hair. their son, sam, has the same curly red hair but not one freckle! how can a child get a chromosome that is totally different from the original chromosomes of both parents?
a. gene flow
b. genetic drift
c. crossing over
d. natural selection

Any sound above what db can cause hearing loss in human beings

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

Which body region are part of the cephalic region?