I believe it's either genus or species.
Answer:
10
Explanation:
according to newton's second law f=ma. so a= f/m. then a= 20/2 = 10
Answer: A dichotomous key is a tool that allows the user to determine the identity of items in the natural world, such as trees, wildflowers, mammals, reptiles, rocks, and fish. Keys consist of a series of choices that lead the user to the correct name of a given item.
Explanation: google
