All plants have a cell wall, all mammals have a cell membrane. a cell membrane is semi-permeable it allows mammal cells to absorb needed nutrients, oxygen and deposit waste into the blood stream where it is excreted through urine and feces. a plant cells nutrients are absorbed through the root system and leaves, waste is excreted in the form of oxygen through the plant itself.
Microtubules are long,hollow protein cylinder that form a rigid skeleton for the cell golgi apparatus
~Jurgen
Because many living organisms begin in the womb similarly, showing that organisms have a common ancestor
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Explanation:
To become infected with HIV , infected blood, semen or vaginal secretions must enter your body. this can happen by have yk...
