Answer:
Cell membranes serve as barriers and gatekeepers. ... Small polar molecules, such as water and ethanol, can also pass through membranes, but they do so more slowly. On the other hand, cell membranes restrict diffusion of highly charged molecules, such as ions, and large molecules, such as sugars and amino acids.
Explanation:
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Answer:
The answer is A
Explanation:
You can tell that rocks are older or younger depending on if other layers overlap. B is the oldest because all the others cover it, C is the second youngest because D and A overlap it. From what I could tell, when I took the test, it was either A or D, neither overlap each other so I was not sure so I guessed A and got it right. Though it could be looked at that A is smaller than D since its still growing and building.
Chitin - part of insects hard body and part of fungus
Cellulose - part of plant cell walls
Pectin - also part of plant cell walls
Answer:subarachnoid space.
Explanation:Explanation: the cerebrospinal fluid is produced by the ventricles of the brain.it is the circulating fluids that surrounded the brain and the spinal cord.
These fluid supplies the brain and spinal cord with nutrients,removes wastes and protects spinal from trauma.
The lumps puncture is usually done to :
To determine any infection in theCNS (infalamtion of the brain amd spinal cord(meningitis).
To determine if there is bleeding in the CNS.
To Diagnose brain tumor or viral infection.
Answer:
Decreases
Explanation:
When the energy decreases, the agent of erosion does not nave the power to carry large sediments. It drops them off based on their weight (heaviest first),
