A Multiple-Choice Test Has 45 Questions and 5 Choices for Each

question 106

Multiple Choice

A multiple-choice test has 45 questions and 5 choices for each question. If a student is totally unprepared and guesses on each question, how many questions can she expect to answer correctly, and what is the standard deviation of the number of correct answers? Round any estimated quantities to two decimal places. ​

• A) ​
• B) ​
• C) ​
• D) ​
• E) ​

Recognize the immune system’s role in organ transplantation and the concept of MHC compatibility.

Understand the therapeutic applications and implications of monoclonal antibodies in disease treatment.

Understand innate and adaptive immunity mechanisms and distinction.

Identify and describe the roles of various immune cells and molecules in the immune response.

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Definitions:

Cultural Change

Modifications in the shared beliefs, values, customs, behaviours, and artifacts among members of a society.

Species

The smallest working units in biological classificatory systems; reproductively isolated populations or groups of populations capable of interbreeding to produce fertile offspring.

Group Biological Changes

The evolutionary adaptations and alterations in biological characteristics occurring in populations over time.

Geological Time Period

A system of chronological dating that relates geological strata to time, used by geologists to describe the timing and relationships between events that have occurred during Earth's history.