Which of the following statements concerning adaptive immunity is false?

• A. T cells and B cells are key components of adaptive immunity.
• B. Adaptive immunity is present at birth and does not change over time.
• C. Adaptive immunity provides a specific response to pathogens.
• D. Memory cells are generated during adaptive immune responses.

Answer: (B)

Verified step by step guidance

1. Step 1: Understand the definition of adaptive immunity. Adaptive immunity is a specific immune response that develops after exposure to a particular pathogen and improves upon repeated exposures.
2. Step 2: Review the role of T cells and B cells. Both are lymphocytes that play crucial roles in adaptive immunity: T cells help regulate immune responses and kill infected cells, while B cells produce antibodies.
3. Step 3: Analyze the statement about adaptive immunity being present at birth and unchanging. Adaptive immunity is not present at birth in a fully developed form; it matures and adapts over time as the immune system encounters pathogens.
4. Step 4: Consider the concept of memory cells. Memory T and B cells are generated during adaptive immune responses, allowing the immune system to respond more rapidly and effectively upon subsequent exposures to the same pathogen.
5. Step 5: Conclude which statement is false by comparing each option to the established facts about adaptive immunity, focusing on the dynamic nature and development of adaptive immunity over time.