A married man with a wife, a 10-year-old son, and a job that brings in $57,000 a year purchases life insurance. He uses the single parent method to determine how much to insure his wife's life. How much should the policy pay out

$80,000

Explanation:

The calculation is fairly simple, just subtract the child's age from 18 = 18 - 10 = 8 years, and then multiply by $10,000.

The single parent method generally recommends that the parent that stays at home (in this case the wife) must be insured for approximately $10,000 for each year that the child needs to reach 18 and become an adult.

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; sensory adaptation;