)when an isocost line is just tangent to an isoquant, we know that:

a) output is being produced at minimum cost.

b) the two products are being produced at the highest input cost to the firm.

c) the two products are being produced at the least input cost to the firm.

d) output is not being produced at minimum cost.

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.'

answer; career pathways;