TRUE, Epithelial cells are avascular, they have not blood vessels. The only way your "true" outer skin can get nourishment is by diffusion / osmosis from connective tissue just below it. The observable part of your skin is actually dead. Among other reasons, it is too far from the vascular connective tissue to diffuse it's nourishment.
Facilitated diffusion is usually significant to pass the ions across the hydrophobic layer of the plasma membrane. Transmembrane integral protein and careers proteins provide the channels that allow the ion to pass across the membrane. When an ion bind to their active site on the protein (note that the proteins are very selective), the protein changes conformation. It is this change in conformation opens up the channel that allows the ions to be passed across the membrane. When the ions are released inside of the cell, the protein resumes normal shape (and the channel also closes) and the active site becomes available again or another ion.
Answer:
The 5 trees that did not live couldn't receive nutrients as well as the others.
Explanation:
A hypothesis doesn't have to be a perfect statement, it is mainly a scientific guess that is further taken to the experimental level and research level. Your answer could consist of anything as long as it makes logical sense.
You can use a plotting compass or iron filings to detect a magnetic field:
1.put a piece of paper over a magnet (this stops the iron filings sticking to the magnet)
2. sprinkle iron filings onto the paper
3.gently tap the paper to spread the filings out
4.observe and record the results
The 5 characteristics of a mineral are: solid, inorganic, naturally occurring, definite chemical composition, and definite crystalline structure.
