Skin and nerve cells have different appearances and characteristics from each other, although they contain the same dna. why? a. the genes expressed in in skin cells may not be expressed in nerve cells and vise versa
b. the genes in skin cells are transcribed but not translated as genes of nerve cells
c. the dna in nerve cells undergoes mutations making them different from dna in skin cells.

The correct answer is A. the genes expressed in skin cells may not be expressed in nerve cells and vise versa.

Explanation:

Every cell in the body contains the same set of genes in their chromosomes but only some fraction of its gene expresses which allows the different cells to appear and function differently in their environment.

Therefore every cell makes different proteins according to the job that cell performs like in RBC genes are expressed to synthesize the hemoglobin proteins but other cells do not produce this protein because genes for hemoglobin is not expressed in them.

Therefore the right answer is A. the genes expressed in skin cells may not be expressed in nerve cells and vise Versa.

answer: grassland biomes are closer to the equator and receive more rain.

grasslands are biomes that are dominated by grasses rather shrubs and trees. savanna are biomes that exhibit grasses, shrubs and small tree as vegetation. grasslands are located near the equator of the earth. these are found in north america. savanna biomes are found in africa, south america, australia and india. grassland exhibit moderate climatic conditions, it receives   amount of rainfall higher than savanna.   therefore, savanna exhibit dry and hot climatic conditions.