<span>a. They have homologous structures because they have a common ancestor.
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What's up? i learned this a pretty long time ago so bear with me
all cells: dna, nucleus, ribosome, cytoplasm, cell membrane, (mitochondria??)
1/2: cell wall, vesicles
i think i may be wrong on mitochondria, again i honestly forget this due to the school system kinda failing us
<span>The respiratory system deals with the body's breathing system, including the mouth, throat and lungs. An example of something the respiratory system doesn't do is anything with the digestive system. The digestive system consists of the mouth, throat, stomach, intestines and colon. It processes food and liquids into nutrients and energy for the body.</span>
Some fun fact to me is that you can compare the cell to a factory - I always found it interesting. So the nucleus would be like the CEO, and the Endoplasmic Reticulum (ER) is like an assembly line - it's actually quite similar to a line like this!. And Ribosomes are the workers on this line.
