Biology 101 Exam Questions and Answers(A+ Solution guide)

These can be bonded to form molecules. - Answer-Atom Atoms bonded together form these, DNA is an example. - Answer-Molecule These are (membrane-bound) compartments in the cells of eukaryotic cells. - Answer-Organelle Most biologist consider life to begin at this level. - Answer-Cell Cells working together for a common function. - Answer-Tissue Tissues working together for a common function. - Answer-Organ Organs working together for a common function. - Answer-Organ System Organ systems form this in higher forms of life, this is the highest organization for bacteria and protists. - Answer-Organism Organisms that can interbreed and produce viable offspring. - Answer-Species A species in a specific area. - Answer-Population Different populations in a common area. - Answer-Community The community and the nonliving parts. - Answer-Ecosystem 6 - Answer-6 C12 What is the atomic number of the above element? Potassium - Answer-Which has the higher atomic number? 18Ar40 or 19K39 Calcium - Answer-Which is not among the four most common elements? liquid water has greatest density at this temperature - Answer-4C Water freezes at this temperature - Answer-0C Water boils at this temperature - Answer-100 C