Which form of research is most commonly used when observing animals in the wild

Coquina, a type of limestone, forms from shell fragments that settle on the ocean floor. what type of rock is coquina?

An ecologist is studying the effects that a population of predators is having on a population of a prey. he used data from the field to produce this graph. which conclusion can draw from the graph?

What is the name of the type of cell division that occurs in the prokaryotic cell cycle