Chapter 1-3 exam general biology Questions And Answers Rated A+ New Update Assured Satisfaction

How are organisms classified - Answer--organisms are organized -organisms acquire materials and energy -organisms reproduce -organisms respond to stimuli -organisms are homeostatic -organisms grow and develop -organisms have the capacity to adapt homeostasis - Answer-internal environment of an organism stays relatively constant natural selection - Answer-allows organisms to be better suited for their environment levels of biological organization - Answer-atom-molecule-cell-tissue-organ-organ system-organism what's a cell? - Answer-the smallest unit of life What are the domains of classification? - Answer-Eukaryotes, bacteria, archaea Classification order - Answer-kingdom, phylum, class, order, family, genus, species biosphere - Answer-the zone, air, land, water on earth where living organisms are found what is the most important factor affecting ecosystem locations? - Answer-humans scientific method - Answer-1. observation 2. hypothesis3. experiment 4. conclusion 5. scientific theory observation - Answer-natural phenomena can be understood more fully by observing then studying them hypothesis - Answer-after making observations and gathering knowledge about a phenomenon, a scientist uses inductive reasoning to come up with a hypothesis, a tentative explanation for the natural event Experiment/further observation - Answer-testing a hypothesis involves either conducting an experiment or making observations Conclusion - Answer-Scientists must analyze the data to reach a conclusion to determine if the hypothesis can be supported or not. Scientific theory - Answer-The ultimate goal of science is to understand the natural world in terms of scientific theories, concepts that join together well-supported and related hypotheses independent variable - Answer-the thing being tested in an experiment response variable - Answer-the thing that may or may not change due to the independent variable protons - Answer-postive, in nucleus electrons - Answer-negative, outside nucleus in cloud/orbitals neutrons - Answer-neutral, in nucleus what can electrons tell you about an element? - Answer-What atoms the element will react withisotope - Answer-atoms of the same element that differ in their numbers of neutrons molecule - Answer-formed when two or more atoms bond together, oxygen (O2) compound - Answer-When the atoms of two or more different elements bond together, the product (dihydrogen monoxide) why is water essential to life? - Answer--high heat capacity -high heat of vaporization -a solvent-both cohesive and adhesive qualities -high surface tension -ice is less dense than water Acids - Answer-substances that release hydrogen ions when they dissociate in water bases - Answer-substances that either take up hydrogen ions or release hydroxide ions buffers - Answer-substance that keeps the pH within normal limits