Please help asap Which step of Koch's postulates is
incorrect?
1.The pathogen is first found in an infected, unhealthy
person.
B. 2.The pathogen is isolated from an unhealthy person
and grown in a lab.
C. 3.The pathogen grown in a lab will be given to a healthy
organism that gets the same disease.
D. 4.The pathogen should be isolated again and should
have mutated when compared to the original.

in situ hybridization has been widely used for research applications, including clinical cytogenetics, gene mapping, tumor biology and studies of chromosome evolution.

answer: decrease

a limiting factor is the one which decrease the abundance, distribution and causes extinction of the population of species in a ecosystem. here, predators including hawks, owls and snakes are the limiting factor for the population of mexican free tailed bat.   although bats are nocturnal animals as they forge for food at night these predators also may remain active during night which can decrease the population of the mexican free-tailed bats. also, these bats eat only one type of insects that are moths. the food can also be a limiting factor as all 400 members are dependent upon same type of food needs that are moths. the decrease in the moth population can cause decrease in population size of the mexican free-tailed bats.

therefore, the scenarios will most likely to decrease the population size of the mexican free-tailed bats.  

b. lithosphere, asthenosphere, mesosphere   is the answer most likely