Which type of muscle decreases the size of the pupils of your eyes in bright light a)skeletal b)smooth c)cardiac d) a and c

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.) antibody, antibiotic b.) antigen, antibody c.)antibiotic, antibody d.)antibody, antigen

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

Which of th following best describes how genes produce traits in an organism?