In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.

Question: Fruit fly and brine shrimp hox genes have evolved independently for how long? Answer: 400 million years
Fruit fly and brine shrimp hox genes have evolved independently for 400 million years long.

Question: Alkaline earth metals are what color? Answer: silvery grey
Alkaline earth metals are silvery grey color.

Question: Amoebas and paramecia are examples of what? Answer: protozoa

Amoebas and paramecia are examples of protozoa.