The trilobites seen in this image was once found widespread in the ocean. something changed to limit and finally abolish their success. what do scientists use this example as proof of ?

a. life changes over time .

b. homologous structures can be found among many species

c. vestigial organisms once had a function in ancient times

d. the fossil record is incomplete

Dr. kaylan is an ecologist who studies bird behavior. she sets up an experiment to test which type of food crows are most likely to eat when given a choice between walnuts, corn, and sunflower seeds. to perform her experiment, dr. kaylan places three food bins in an area frequented by cows. each bin contains one of the three food types. then, she measures how much of each food type is eaten every day for a month and summarizes the results of her experiment in the pie chart below. based on her results, dr. kaylan concludes that crows choose to eat corn more frequently than other food sources because it has a higher nutritional value. what is a reasonable alternate conclusion that can be drawn from dr. kaylan's data

Which of the following is the earliest era of earth's geologic time scale? cenozoic mesozoic precambrian paleozoic

What is the correct order of cell division? include what happens in each phase