Answer:
The cell part that allows only certain substances to diffuse into and out of the cell is called the semi permeable membrane.
Answer:
Mikroalga adalah alga mikroskopik, biasanya terdapat di sistem air tawar dan laut. Mereka adalah spesies uniselular yang wujud secara individu, atau dalam rantai atau kumpulan. Bergantung pada spesies, ukurannya boleh berkisar antara beberapa mikrometer (µm) hingga beberapa ratus mikrometer.
Explanation:
I do not want to say they are a part of Central America, but they are located Southwest of Central America. And they are South of America. I hope this helps!
Not at all. They exist in small amounts.
Hope this helps !
Photon