A train increases it's speed from 0 mi/hr to 120 mi/hr. In order to calculate the train's acceleration you would also have to know the direction the train is moving
the mass of the train
how long it took for it to increase its speed
the distance the train is traveling

Centriole.centrioles are present in animal cells but are usually absent in plant cells.

Yes yes yes very good

The  pelagic  region is divided into three zones. the top zone is the euphotic or sunlit zone. this is the ocean zone that sunlight penetrates. because this zone gets sunlight, photosynthesis can occur and plants can grow here.sub  zones. the oceanic zone is subdivided into the epipelagic,  mesopelagic, and bathypelagic zones. the epipelagic (euphotic) zone, also called the sunlit zone, receives enough sunlight to support photosynthesis.your question does not include multiple choice,but i can give you some info on what the 3 zones hope this : -)