Bonnie is getting close to retirement and realizes she has three different IRA accounts at three different financial institutions. To make life simpler, Bonnie wishes to consolidate her three IRAs into a single account in 2019 using trustee-to-trustee direct rollovers. How many rollovers of this type can Bonnie make in 2019?

no limit

Explanation: There is no limit to the dollar amount of the transfer or the number of times a taxpayer can do this in a single tax year.

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.'