Answer:
Carbon
Explanation:
Most organic compounds contain carbon, hydrogen, and sometimes other elements such as nitrogen, sulfur, oxygen, or phosphorus. All living organisms contain carbon—even bacteria.
Answer: Ovulation
Explanation: Ovulation is a period whereby eggs are released by the ovaries. During the menstrual cycle, there is the presence of follicles in the ovaries and when the follicles are ripe or mature there is a rise in the level of oestrogen produced by the ovaries in a woman leading to a increase in the production of the lutenizing hormone ( LH) thereby resulting in the release of the mature egg(s) by the ovaries.
Answer:
The electron transport system is located in the cell membrane in bacteria, while in eukaryotes it is located in the mitochondrial cristae
Explanation:
Endosymbiosis is the hypothesis that complex organelles ( chloroplast and mitochondria) within the cell came from other living organisms. That is, they originated because one cell ingested another cell. A proof of this is that these organelles have their own genome and their own transcription and translation system. Their genome is independent of the genome within the nucleus of the cell.
The genome of the mitochondria is specialized in the electron transport system. The ingestion of a cell (i.e. bacteria) with such genome could bring evolutionary advantages to the to the ingesting cell over other cells without the mitochondrial genome.
Protons are represented as the atomic number.