The most common and obvious fossils are the preserved skeletal remains of animals. Other fossils, which are also evidence of past organisms, include leaf impressions, tracks and trails, burrows, droppings, and root casts.
Lesson Summary. Non-experimental research does not mean nonscientific. Non-experimental research means there is a predictor variable or group of subjects that cannot be manipulated by the experimenter. Typically, this means that other routes must be used to draw conclusions, such as correlation, survey or case study.
No, the noun 'research' is a non-count noun, a type of  aggregate noun, a word representing an indefinite number of  elements or parts. The noun 'research' has no plural for â¦ m.    The word 'research' is also a verb: research, researches,  researching, researched.he importance of the topic sentence is to make the essay flow so it should link to you â¦ r contention in the introduction The sentences are based on the areas or categories into which you grouped your data. Before you write a paper you should compose a 3-point thesis statement. These 3 points will be your topics.