DNA or protein from a virus entered bacterical cells during infection
<span>Once a month an egg is released from one of the almond shaped organs known as the ovary.</span>
The addition of acetyl groups to histones is associated with chromatin condensation and and higher levels of gene expression
the Nucleus
Explanation:
Known as the cell's “command center,” the nucleus is a large organelle that stores the cell's DNA (deoxyribonucleic acid). The nucleus controls all of the cell's activities, such as growth and metabolism, using the DNA's genetic information.
Depending on the organism, the cell can get its energy from the sun (Plant; Photosynthesis) or through ATP energy (Animal).
