Suppose that the public holds 50% of the money supply in currency and the reserve requirement is 20%. banks hold no excess reserves. a customer deposits $6,000 in her checkable deposit. as a result of the deposit, required reserves will increase by:

the required reserves will increase by 1,200 dollars

Explanation:

the required reserve ratio is 20%

for each dollar the bank receive in deposit it can loan up to 80% and must keep 20%

the multiplier will be: 1 / 0.2 = 5

each dollar of deposit will increase the money supply by 5

and each dollar withdraw will decrease money supply by 5

Therefore, for this deposit of 6,000 dollars the bank will kept:

$6,000 x 20% = $1,200

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.'