the phospholipid bilayer:
1. allows certain substances in and out of the cell
2. allows the water in the cell to stay in and the water outside to stay out.
Answer:
4.54 billon years
Explanation:
the earliest time that life forms first appeared on Earth is at least 3.77 billion years ago possibly as early as 4.28 billion years
Answer:
The answer is in the picture
Explanation:
I don't really know how to explain I mean cells were just made that way so I hope this answer helped.
Lysosomes are the vesicles that contain a cell's digestive enzymes. Lysosomes are the vesicles that contain a cell's digestive enzymes.
Basically let's you breathe easier.
Explanation:
The alveoli are only one cell thick. Which allows relatively easy passage of oxygen and Carbon Dioxide between the alveoli and blood vessels. (Capillaries
