Which of the following would make the best index fossil? 1 point
A. An insect that only existed in one small forest for about 100 million years.
B. An aquatic animal that existed all over the world for about 15 million years.
C. A single-celled organism that lived in a widespread region for about 25 million
years.
D. A plant species that lived in a specific geographic region for about 5 million years.

Anybody who knows ap biology, can you friend or message me

The earth consists of a variety of different organisms. despite their diversity, however, some similarities on the structural and metabolic levels may be seen. these similarities can be attributed to a. similarities among organisms in their proteins and nucleic acids. b. the ability of organisms to readily adapt to sudden environmental changes. c. similarities in organisms' habitats and niches. d. the ability of all organisms to interbreed and produce new species.

If bacteria are much too small to see, what is one reason why can we see colonies in the petri dishes that have plenty of food to eat after only a few days?