Which term describes anything that causes an organism to react?

Which of the following statements most accurately describes convergent evolution? the process in which two similar species evolve separately from each other and share similar characteristics the process in which a single species evolves into two or more new species the process in which two entirely different species evolve in response to each other the process in which two different species evolve separately from each other but still share similar characteristics

Me the formula cacl2 represents the compound

Fungi are classified into how many groups? a. 1 group b. 2 groups c. 3 groups d. 4 groups