What is the atomic mass of an element with 8 protons and 9 neutrons? What is the atomic mass of an element with 20 protons and 21 neutrons?

How many neutrons are found in an atom of Fluorine?

Mention true or false : a) cholera is marked by acute diarrhea and no urination. b)mosquitoes are the source of dysentery germs.

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

Dna replication or repair occurs in a cell in all of thw following situations except when