Question

1. why does cell division remain important to an adult organism even after it is fully developed? 3. cells divide, differentiate, or die. what is differentiation? 4. what is apoptosis? what is its purpose?

Explanation:

Question 2:

Adult organisms need cell division for tissue repair (e.g., healing wounds) and replacement of dead/damaged cells (e.g., skin cells, blood cells). Cells have a limited lifespan, so division replenishes them to maintain organ function.

Differentiation is the process where unspecialized cells (stem cells) become specialized in structure and function. Genes are selectively expressed, leading to cells with distinct roles (e.g., muscle cells, nerve cells).

Apoptosis is programmed cell death. Its purpose is to eliminate damaged/unnecessary cells (e.g., during development, like removing webbing between fingers; or to prevent cancer by killing abnormal cells).

Answer:

Cell division is important for tissue repair (e.g., healing injuries) and replacing dead/damaged cells (e.g., skin, blood cells) to maintain organ/tissue function.

Question 3: