Question

why do different cell types (like skin, muscle, and nerve cells) look and act differently?
○ they have different dna
○ they lose dna as they develop
○ they use different sets of genes
○ they only use proteins from other cells

Explanation:

• "They have different DNA" is incorrect because most cells in an organism have the same DNA.
• "They lose DNA as they develop" is incorrect; cells don't typically lose DNA during normal development to differentiate.
• "They use different sets of genes" is correct. Cell differentiation occurs due to gene expression, where different cell types use (express) different subsets of the total genes in the genome, leading to different structures and functions.
• "They only use proteins from other cells" is incorrect; cells synthesize their own proteins based on their expressed genes.

Answer:

C. They use different sets of genes