Every cell of the organism has the same DNA sequence and same genes. However, not all genes are expressed in every single cell at the same time. Only those genes necessary for a specialised function of a specialised cell are expressed in the specialised cell. For example, skin cells have some different proteins than nerve cells. Genes responsible for those "skin proteins" are activated in skin cells and are turned off in nerve cells.
Answer:The answer is A
Explanation:I have had the question before
Answer:
Waste disposal
Why? Contributes to the greenhouse effect and causes pollution
Solution: If you bring your lunch to school, package it in reusable containers instead of disposable ones. Carry food in reusable plastic or cloth bags, and bring drinks in a thermos instead of disposable bottles or cartons.
Solution: Compost leftover food
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