Which of the following is an example of biological weathering?

In this assignment, you will analyze an example of speciation by researching the finches of the galapagos islands. then you will answer questions to construct explanations and draw conclusions based on the information you gather. someone plz !

Which are characteristics of flukes? check all that apply. a they are free living. b they are a type of flatworm. c they reproduce sexually. d they have eyespots. e they are segmented.

There are fewer than 100 naturally occurring elements in the universe, but there are millions of different unified substances. explain how this can be true.