All Chapters
Ch.1 - Introduction to Biology
Ch.2 - Chemistry
Ch.3 - Water
Ch 4. Biomolecules
Ch. 5 Cell Components
Ch.7 - The Membrane
Ch.8 - Energy and Metabolism
Ch.9 - Respiration
Ch.10 - Photosynthesis
Ch.11 - Cell Signaling
Ch.12 - Cell Division
Ch.13 - Meiosis
Ch.14 - Mendelian Genetics
Ch.15 - Chromosomal Theory of Inheritance
Ch.16 - DNA Synthesis
Ch.17 - Gene Expression
Ch.18 - Regulation of Expression
Ch.19 - Viruses
Ch.20 - Biotechnology
Ch.21 - Genomics
Ch.22 - Development
Ch.23 - Evolution by Natural Selection
Ch.24 - Evolution of Populations
Ch.25 - Speciation
Ch.26 - History of Life on Earth
Ch.27 - Phylogeny
Ch.28 - Prokaryotes
Ch.29 - Protists
Ch.30 - Plants
Ch.31 - Fungi
Ch.32 - Overview of Animals
Ch.33 - Invertebrates
Ch.34 - Vertebrates
Ch.35 - Plant Anatomy
Ch.36 - Vascular Plant Transport
Ch.37 - Soil
Ch.38 - Plant Reproduction
Ch.39 - Plant Sensation and Response
Ch.40 - Animal Form and Function
Ch.41 - Digestive System
Ch.42 - Circulatory System
Ch.43 - Immune System
Ch.44 - Osmoregulation and Excretion
Ch.45 - Endocrine System
Ch.46 - Animal Reproduction
Ch.47 - Nervous System
Ch.48 - Sensory Systems
Ch.49 - Muscle Systems
Ch.50 - Ecology
Ch.51 - Animal Behavior
Ch.52 - Population Ecology
Ch.53 - Community Ecology
Ch.54 - Ecosystems
Ch.55 - Conservation Biology

Concept #1: Properties of Water- Cohesion and Adhesion

Example #1: Cohesion, surface tension and adhesion are properties of water molecules that ________.

Practice: Which of the following effects can occur because of the high surface tension of water?

a) Lakes cannot freeze solid in winter even with extremely low temperatures.

b) A spider can walk across the surface of a small pond.

c) Organisms can resist temperature changes, although they give off heat due to chemical reactions.

d) Sweat can evaporate from the skin, helping to keep people from overheating.

Practice: Cohesive forces in liquid water occur when:

a) The H atoms on molecules of H2O hydrogen bond to O atoms on adjacent molecules of H2O.

b) The H atoms on molecules of H2O hydrogen bond to other H atoms on adjacent molecules of H2O.

c) The atoms on molecules of H2O hydrogen bond to other O atoms on adjacent molecules of H2O.

d) None of the above are correct.