If the central bank of macroland puts an additional 1,000 dollars of currency into the economy, the public deposits all currency into the banking system and banks have a desired reserve/deposit ratio of 0.20, then the banks will eventually make new loans totaling and the money supply will increase by

Explanation:

First we have to determine the money multiplier of Macroland:

If $1,000 are deposited in banks and the banks have a 20% reserve ration, they will be able to lend $800. The $800 will then increase to $4,000 (= $800 x 5) because of the money multiplier.

The total increase in the money supply is given by the $1,000 deposited originally and the $4,000 in increased loans = $5,000

the answer is i don't know

ans.

heterothermic organisms include those organisms that can switch between homeothermic (having body temperature higher than environment) and poikilothermic (having variation in internal body temperature) strategies.

some migratory birds show heterothermy as they decrease their metabolic rate during cold nights to keep their body temperature low. drop in metabolic rate allows increase in production efficiency of birds that reduces the internal body temperature to make it equal to external cold temperature during cold nights.

thus, the correct answer is 'birds allow their temperature drop in order to increase their production efficiency.'