Which foundational concepts in biology were merged in the modern synthesis? a. darwin's theory of evolution and mendel's ideas of heritability b. darwin's theory of evolution and chargaff's rules of base pairing c. darwin's theory of evolution and watson's and crick's structure of dna d. darwin's theory of evolution and hershey's and chase's proof of dna as genetic material

A. Darwin's theory of evolution and Mendel's ideas of heritability

Explanation:

Modern synthesis is the theory of evolution that combines Darwin's theory of natural selection and principles of Mendelian inheritance. This was done to explain the origin of variations among individuals in the population as proposed by Darwin. Darwin could not explain how variations were created and how these variations were transmitted to future generations. Mendel's laws of inheritance provided an explanation of the basis of the origin of variations and mode of their transmission.  

This is how modern synthesis came into existence.  

americans began to notice growing differences between the northern and southern sections of the country. there were more people living in cities in the north, which made it more urban. more people lived on farms in the south, which made it more rural. while many people were farmers in the northern states, there were now other ways to make a living, such as working in mechanical cotton gins factories manufacturing cloth, tools and other goods. people in the north supported high tariffs on goods imported from europe because the extra cost encouraged people to “buy american” instead. in the southern states, planters did not like tariffs because they sold most of their production to europe and bought their tools from there as well. southerners believed the protective tariff was something that only northern factory owners keep their profits high. so the southern politicians came up with an idea. they would opt out. they would simply ignore the protective tariff. it was ‘null and void’ in south carolina. the state would not collect the taxes on goods imported into south carolina, no matter what the president said they had to do. this decision led to the nullification crisis.

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.