The correct answer is :
Some substances but not other can cross the (blank ) membrane of a cell. The blank is to be filled with either cell or plasma. Cell membrane or plasma membrane is the living boundary of a cell which is made of phospholipid. It is a semi-permeable or differentially permeable membrane. It only allows small and non-polar molecules to pass through it. It prevents polar ions or molecules to pass through it
Answer:
For early earth, it was filled with loads of oxygen and could kill humans if they breathed the oxygen that was in the air about 100 million years ago. This massive amount of oxygen cause massive creatures like the dinosaurs to exist. Current earth has an atmosphere with not too much oxygen.
Explanation:
brainliest
It is kind of difficult for me even, but I know that neutral objects<span> have an even amount of opposite </span>charges<span>. When </span>brought near a charged object<span> the </span>neutral's<span> protons will lean toward excess electrons on the </span>charged<span> one. A positively </span>charged object<span> will attract the neutrals electrons to move toward it. I hope that kind of helped. Sorry if I couldn't give a direct answer! Its kind of hard for me too and I'm an A+ student in bio</span>
Deadly diseases ;) Glad to help!!
