Afood handler uses the same spatula to place raw hamburgers on a grill and then remove cooked chicken breast from a frying pan is this correct

No, it is not correct to use same utensils for handling raw and the cooked food.

Cooking raw food an meat with the same utensil, can cause the transmission of meat particles on the hamburger. The hamburger is not cooked in a similar manner to the meat, so, the meat particles on the hamburger may remain uncooked, and may be they are contaminated with some pathogen, which can harm our body system. Hence, it is important to use different utensils for handling raw food and cooked food.

they are known to reach a speed of 21 miles per hour

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.