New species can form through allopatric or sympatric speciation. which of the following mechanisms will act more strongly on populations that are initially separated in allopatry than on those initially separated in sympatry? reinforcementgenetic driftgene flowdisruptive selection

genetic drift

Explanation:

Allopatric speciation is a form of speciation (creation of new species) that occurs as a result of geographic isolation. This means that a part of population becomes physically separated from the initial main population. There is no gene flow between these two populations and as a result the two populations  reach a high level  of genetic divergence. They can no longer interbreed which means they become two different species (speciation) .

New populations evolve as result of mutation, genetic drift and natural selection.

Sympatric speciation is a form of speciation without geographic isolation, usually due to  the reproductive isolation or changes in the chromosomes of the organism.

hormones in blood stream

image: dtc.ucsf.edu

endocrine glands secrete hormones into the blood stream near them; the hormones then travel in our bloodstream until it reaches its destination, called a target cell, in distance parts of the body. in the target tissue, hormones lock onto the target’s plasma membrane, called the receptor site.

this protocol provides a detailed procedure for nucleoprotein extraction from cultured cells and tissues in an efficient manner.