Two firms, A and B, each currently dump 20 tons of chemicals into the local river. The government has decided to reduce the pollution and from now on will require a pollution permit for each ton of pollution dumped into the river. The government gives each firm 10 pollution permits, which it can either use or sell to the other firm. It costs Firm A $100 for each ton of pollution that it eliminates before it reaches the river, and it costs Firm B $50 for each ton of pollution that it eliminates before it reaches the river. After the two firms buy or sell pollution permits from each other, we would expect that:.

Firm B will no longer pollute and firm A will no longer reduce its pollution at all.

Explanation:

It is noticed here that this is used as a form to calculate the pollution production rate of both firms in the case above.

Therefore, firm B will have to sell out its allotted 20 permits, and clean up all of its 50 units of pollution. The price per permit will be above $50 each. Firm A will BUY ALL 20 of B's permits. It will then dump 40 tons into the water, and will clean up its remaining 10. The price it pays for a permit will be under $100.

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.'