Which TWO of the following are disadvantages of using email? the threat of getting scammed the possibility that an email is not delivered to specified recipients a personal email being read by unintended recipients increased official communication in the workplace the risk of computers malfunctioning

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; blank(1); /rises; blank(2); //increases;

answer; comparing the additional benefits and costs;