Test 2 Bio 100 Nelson BYU Questions & Answers

Test 2 Bio 100 Nelson BYU Questions & Answers What is life? - Answer-Regulation, Homeostasis Growth and Development Use Energy Responds to Environment Reproduce Evolve Order, Complex Organization * Has to have all of these points in order to be considered alive How to be successful - Answer-Survive and reproduce Endosymbiosis - Answer-A theory of how parts of cells came to be-mitochondria and chloroplasts are bacteria. This bacteria is usually eaten by cells. However, when these cells absorbed these bacteria, they formed a symbiotic relationship, so the cell did not digest the bacteria. That is why mitochondria and chloroplasts reproduce at a different rate than the cells in which they live. Rules of the Serengeti - Answer-Keystone species: not all species are equal Migration changes numbers Trophic cascades- some species indirectly affect others. Nature is resilient Regulation of a species depends upon their density Competition: limited resources Life is important in... - Answer-The nitrogen cycle Energy flows - Answer-Nutrients cycle Hydroxyl - Answer-has one OH Amino - Answer-has N bonded to two H Carbonyl - Answer-has one double bonded O Carboxyl - Answer-has a double bonded O and an OH A Four-Stage Hypothesis for the Origin of Life (Reductionist Model) - Answer-Synthesis of Organic (contain carbon) Compounds - Amino acids and nucleotides Abiotic Synthesis of Polymers- Proteins and nucleic acids Formation of Pre-Cells- Membrane Origin of Self Replicating Molecules- DNA and RNA Common elements in living things- C.H.O.N.P.S - Answer-Carbon...