Which of the following statements regarding the primary versus the secondary immune response is true?

the antibodies produced in a primary response bind to antigens more efficiently than the antibodies produced in a secondary immune response
a primary response leads to higher levels of antibodies than does a secondary response.
a primary response results when naive lymphocytes are activated, while a secondary response is a result of activating memory cells
a primary response occurs faster than a secondary response

Researchers randomly divide participants into groups. each group takes a different amount of omega-3 fatty acid supplements daily for a month. one group receives a placebo. the researchers measure the impact on cholesterol levels in the blood. what is the purpose of random assignment in this experiment? a, to produce treatment groups with similar characteristics b, to ensure that all people with high cholesterol have an equal chance of being selected for the study c, to increase the accuracy of the research results and prevent skewness in the data

Asap what occurs after cytokinesis is completed at the end of meiosis 1?

Read the scenario below and answer the question that follows. hallie is reading a novel in the library when susan, her best friend, slumps down in a chair next to her. susan doesn't say anything, but hallie knows that susan is upset because she is slumping in her seat and rolling her eyes. a psychologist would explain that hallie is interpreting her friend's emotion based on a. the behavioral component of emotion b. her friend's ability to regulate emotion c. the verbal component of emotion d. the physiological component of emotion select the best answer from the choices provided a b c d