| I I I I I | letter |
| Ice floats | chapter 3 | bio 113 | heading |
| Image search | chapter 51 | bio 114 | heading |
| Impact of prokaryotes | chapter 27 | bio 114 | heading |
| Imperfect fungi | chapter 31 | bio 114 | heading |
| Imploration | chapter 14 | bio 113 | heading |
| Imprinting | chapter 51 | bio 114 | heading |
| Imprinting, genomic | chapter 15 | bio 113 | heading |
| In situ hybridization | chapter 20 | bio 113 | heading |
| Inactivation, mRNA | chapter 19 | bio 113 | heading |
| Inactivation, protein | chapter 19 | bio 113 | heading |
| Inbreeding | chapter 23 | bio 114 | heading |
| Inclusive fitness | chapter 51 | bio 114 | heading |
| Incomplete dominance | chapter 14 | bio 113 | heading |
| Indentification of the proper clone | chapter 20 | bio 113 | heading |
| Independence, statistical | chapter 14 | bio 114 | heading |
| Independent assortment | chapter 13 | bio 113 | heading |
| Independent assortment | chapter 14 | bio 113 | heading |
| Independent assortment | chapter 15 | bio 113 | heading |
| Induced fit | chapter 6 | bio 113 | heading |
| Inducer | chapter 18 | bio 113 | heading |
| Inducible operon | chapter 18 | bio 113 | heading |
| Induction | chapter 21 | bio 113 | heading |
| Inheritance, cytoplasmic | chapter 15 | bio 113 | heading |
| Inheritance, polygenic | chapter 14 | bio 113 | heading |
| Inhibition, feedback | chapter 6 | bio 113 | heading |
| Inhibitors | chapter 6 | bio 113 | heading |
| Inhibitors, allosteric | chapter 6 | bio 113 | heading |
| Inhibitors, competitive | chapter 6 | bio 113 | heading |
| Inhibitors, noncompetitive | chapter 6 | bio 113 | heading |
| Initiation | chapter 17 | bio 113 | heading |
| Inorganic phosphate | chapter 4 | bio 113 | heading |
| Insecta, class | chapter 33 | bio 114 | heading |
| Insertion | chapter 17 | bio 113 | heading |
| Insight learning | chapter 51 | bio 114 | heading |
| Integral membrane proteins | chapter 8 | bio 113 | heading |
| Interactions, interspecific | chapter 53 | bio 114 | heading |
| Interactions, noncovalent | chapter 2 | bio 113 | heading |
| Interference competition | chapter 53 | bio 114 | heading |
| Intermediate filaments | chapter 7 | bio 113 | heading |
| Interphase | chapter 12 | bio 113 | heading |
| Interphase I | chapter 13 | bio 113 | heading |
| Interphase II | chapter 13 | bio 113 | heading |
| Interphase, G2 of | chapter 12 | bio 113 | heading |
| Interphase, gap phases of | chapter 12 | bio 113 | heading |
| Interphase, S phase of | chapter 12 | bio 113 | heading |
| Interphase, Synthesis phase of | chapter 12 | bio 113 | heading |
| Interspecific competition | chapter 53 | bio 114 | heading |
| Interspecific interactions | chapter 53 | bio 114 | heading |
| Intrinsic rate of population increase | chapter 52 | bio 114 | heading |
| Introduction to Animal Evolution | chapter 32 | bio 114 | chapter title |
| Introduction to water | chapter 3 | bio 113 | heading |
| Introgression | chapter 24 | bio 114 | heading |
| Introns and exons | chapter 17 | bio 113 | heading |
| Inversion | chapter 15 | bio 113 | heading |
| Invertebrates | chapter 32 | bio 114 | heading |
| Invertebrates | chapter 33 | bio 114 | chapter title |
| Invertebrates | chapter 33 | bio 114 | heading |
| Investment, parental | chapter 51 | bio 114 | heading |
| Ion-channel receptors | chapter 11 | bio 113 | heading |
| Ionic bonds | chapter 2 | bio 113 | heading |
| Ions, hydrogen | chapter 3 | bio 113 | heading |
| Ions, hydroxyl | chapter 3 | bio 113 | heading |
| Island biogeography | chapter 53 | bio 114 | heading |
| Isogamy | chapter 28 | bio 114 | heading |
| Isolates, peripheral | chapter 24 | bio 114 | heading |
| Isolation, behavioral | chapter 24 | bio 114 | heading |
| Isolation, gametic | chapter 24 | bio 114 | heading |
| Isolation, geographical | chapter 24 | bio 114 | heading |
| Isolation, habitat | chapter 24 | bio 114 | heading |
| Isolation, mechanical | chapter 24 | bio 114 | heading |
| Isolation, postzygotic | chapter 24 | bio 114 | heading |
| Isolation, reproductive, selection for | chapter 24 | bio 114 | heading |
| Isolation, temporal | chapter 24 | bio 114 | heading |
| Isomer, geometric | chapter 4 | bio 113 | heading |
| Isomers | chapter 4 | bio 113 | heading |
| Isomers, structural | chapter 4 | bio 113 | heading |
| Isomorphic | chapter 28 | bio 114 | heading |
| Isotonic | chapter 8 | bio 113 | heading |