As we learned in the rat dissection lab one of the main differences between rats and humans is orientation and direction. the dorsal side of a rat points in the upwards direction though in humans the dorsal side is the same as the direction.

The correct answer is: Posterior

Explanation:

In the anatomy of humans, the standardized anatomical terms of location are used to precisely describe and transfer the information of the animal bodies and their organs.

The term posterior refers to the back or located towards the back of body of the organism.  

The term dorsal surface refers to the upper side or back of the organism.

Therefore, in humans the dorsal side is the same as the posterior direction.

the answer to your question is b

an organism's phenotype is the  form of a trait  that it  displays. for  flowercolor, a pea  plant  can  display  a phenotype of purple or white flowers. an organism's  genotype  is the alleles of a gene it contains. based on his data, mendel concluded that a phenotype can be  determined  by more than one  genotype.