You eat a french fry. As you chew and swallow, some of the particles go down the ‘wrong tube' (the trachea), and this causes you to cough. The specialized hair-like cell structures that detected this particle in your trachea and triggered the coughing response are called , and are an example of cell specialization, and how structure depends on function.

Your answer is "Cilia".

the correct answer is: b. pantala flavescens, because these organisms would have a high level of genetic variation due to sexual reproduction.  

because involves two organisms (parents) whose genetic material combines, sexual reproduction leads to genetic variation in new generations of offspring. the offspring is an unique organism, with new genome, more protected with the higher ability to adapted. this process is fundamental to evolution.

yes, because even though a theory has a  lot of evidence to support it, it is not always true