What is the function of the pectoral fin on the manta ray?

What is used to keep track of the gamates and possible offsprings combination

Easy 6th grade work! 100 points! i need fast! compare the parts of a cell and the cell as a whole to another common nonliving system (i. e., a car, a city, describe the parts of a cell and their primary function.

Consider the equation s + o2 ? so2. what is the product? question 3 options: s so 2 s + so 2 o 2