A cell is only able to respond to hormones if specific hormone receptors are present in this cell, which is why it can be called a target cell.

hi~~

i would say that hybridization occurs frequently in nature, because there are many types of hybrids that have occurred naturally, such as the mule (male donkey + female horse)

whats the answer to your question?

colors do exist. the color of the sky is actually violet; humans percieve the color of the sky as blue.

the correct answer is option d.

an appositive is a noun, noun phrase or noun clause which follows another noun or noun phrase in order to describe it or name it another way. they are usually used between commas, brackets or dashes.

the example sentence with the correct use of commas is the following:

her uncle, the man over there in the red shirt, owns the hardware store in town.