Vaccines contain either killed or weakened pathogens that stimulate an immune response when they enter the body. which of the following describes the purpose of a vaccine?

a. to make macrophages that will digest an antigen

b. to cause the production of antibodies that will tag ana antigen

c. to raise the internal temperature of the body to guard against an antigen

d. to speed up the inflammatory response to prevent the movement of an antigen

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.  

light dependent reactions:

light independent reactions:

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in a chemical reaction, the atoms and molecules produced by the reaction are called products. no new atoms are created, and no atoms are destroyed. in a chemical reaction, reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products.