The main function is A, secrete hormones
The answer is letter
D.
<span>
Economists often use
the aggregate supply and demand model to reflect the total amount of goods and
services required at all possible price levels during a specific period. It
reflects the overall price of foods and services in an economy for a given
period and is often illustrated with the supply-demand curve. This shows the
relationship between price levels and quantity of output that a particular firm
is willing to provide to the general public.</span>
Active transport means the molecules move against a concentration gradient from areas of lower concentration to areas of higher concentration.
<span>Every day, somewhere in our planet, a unique species of organism becomes extinct as the las member of that species dies. Some examples of this are the Caribbean Monk Seal, Tasmanian Tiger, Quagga, Passenger Pigeon, and the Baiji River Dolphin.
The answer is: <span>Its species.
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I hope it helps, Regards.</span>
