Question

anemia is a condition in which an individual has too many healthy red blood cells.
true
false

question 6 (1 point)
most of the worlds population is lactase persistent.
true
false

question 7 (1 point)
the major histocompatibility complex (mhc) is part of the adaptive immune system.
true
false

Explanation:

Analyze the definition of anemia

Anemia is defined as a condition characterized by a deficiency of red blood cells or hemoglobin, which reduces the oxygen-carrying capacity of the blood. The statement claims that anemia is having "too many" healthy red blood cells, which is false. Having too many red blood cells is known as polycythemia.

Evaluate global lactase persistence

Lactase persistence is the continued activity of the lactase enzyme into adulthood, allowing the digestion of lactose. Globally, only about 35% of the human population is lactase persistent, meaning the vast majority (around 65%) is lactase non-persistent (lactose intolerant). Therefore, the statement that most of the world's population is lactase persistent is false.

Determine the role of the MHC

The Major Histocompatibility Complex (MHC) molecules play a critical role in the adaptive immune system. They bind peptide fragments derived from pathogens and display them on the cell surface for recognition by appropriate T cells, which is essential for initiating the adaptive immune response. Thus, the statement is true.

Answer:

Question 1

• True
• False (Correct answer)

Question 6

• True
• False (Correct answer)

Question 7

• True (Correct answer)
• False