Bio 211 Exam 1 study guide Questions and Answers

Characteristics of Life Answer Living things: -are organized -need energy and materials -maintain homeostasis -respond to stimuli (changes in environment) -reproduce and grow -have adaptations matter Answer Anything that has mass and takes up space element Answer A substance that cannot be broken down into substances with different properties atomic number Answer =number of protons atomic mass Answer =protons (which are = to electrons) + neutrons mass number Answer equal to the sum of the number of protons and neutrons in atom's nucleus. What 6 elements that make up 95% of body weight Answer CHNOPS: Carbon Hydrogen Nitrogen Oxygen Phosphorus Sulfur properties of water that make it important to life Answer Has high heat capacity High heat of vaporization good solvent Natural selection Answer survival of the fittes