Answer:
A) the pressure of Earth's crust upon Earth's mantle
The eardrum is a thin flap of skin that is stretched tight like a drum and vibrates when sound hits it.
You could argue that in early succession areas species may have not been adapted or evolved. In Darwin's theory, life began in a shallow, warm pond. If that is the case, species would then venture deeper when their area they are in is suitable and having success
The secretion of insulin into the bloodstream is done through exocytosis and absorption through the capillary arteries.
Insulin is a protein required to process sugar. This is a <u>naturally produced protein</u> for which the pancreas is responsible. The insulin Protein is considered a transport protein. It is responsible for carrying glucose from the bloodstream into cells to be used as energy.
This protein is of vital importance. The secretion of this protein is done through exocytosis, which means that after passing through the ribosomes and the Golgi, it is contained within a membrane, which will then fuse into the plasmatic membrane and be released from the cell. It is then absorbed through the capillaries to enter the bloodstream.
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In a living thing, both tissue and organs are very important to maintaining homeostasis.