Why i cant use blood agar with Catalase test?

Catalase is the enzyme that breaks hydrogen peroxide (H2O2) into H2O and O2. .

Explanation:

If using colonies from a blood agar plate, be very careful not to scrape up any of the blood agar— blood cells are catalase positive and any contaminating agar could give a false positive.

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the diploid number of chromosomes is sometimes represented by the symbol 2n. for the fruit fly, the diploid number is 8, which can be written as 2n = 8, where n represents twice the number of chromosomes in a sperm or egg cell.