Insects
https://www.ck12.org/c/life-science/insect-reproduction/lesson/Insect-Reproduction-and-Life-Cycle-MS-LS/?conceptCollectionHandle=life-science-%3A%3A-insect-reproduction&collectionCreatorID=3&collectionHandle=life-science
Reptiles
https://www.ck12.org/c/life-science/reptiles/lesson/Reptiles-MS-LS/?referrer=concept_details
http://www.bio.utexas.edu/courses/evolution/amniobiogeo.pdf
Understanding evolution
https://www.ck12.org/c/biology/amphibian-evolution-and-ecology/rwa/A-Great-Leap-To-Speciation/?referrer=concept_details
Amphibians
https://www.ck12.org/c/biology/amphibian-structure-and-function/lesson/Amphibian-Structure-and-Function-BIO/?referrer=concept_details
https://www.ck12.org/c/biology/amphibian-reproduction/lesson/Amphibian-Reproduction-and-Development-BIO/?conceptCollectionHandle=biology-%3A%3A-amphibian-reproduction&collectionCreatorID=3&collectionHandle=biology
Birds
https://www.ck12.org/c/life-science/birds/lesson/Birds-MS-LS/?referrer=concept_details
https://www.ck12.org/c/life-science/birds/lecture/Birds-Vertebrates/?referrer=concept_details
Mammals
https://www.ck12.org/c/life-science/mammals-overview/lesson/Mammal-Characteristics-MS-LS/?referrer=concept_details
https://www.ck12.org/c/biology/mammal-reproduction/lesson/Mammal-Reproduction-MS-LS/?collectionHandle=biology&conceptCollectionHandle=biology-%3A%3A-mammal-reproduction&collectionCreatorID=3
Energy Pyramid
https://www.learner.org/courses/essential/life/session7/closer5.html
https://www.ck12.org/assessment/tools/geometry-tool/plix.html?eId=SCI.BIO.404&questionId=533ded035aa41307737c77a4&artifactID=1824158&conceptCollectionHandle=biology-::-ecosystems&collectionCreatorID=3&plix_redirect=1
Biodiversity
https://www.ck12.org/c/biology/sources-of-genetic-variation/lesson/Sources-of-Genetic-Variation-Advanced-BIO-ADV/?referrer=concept_details
https://www.ck12.org/c/earth-science/adaptation-and-evolution-of-populations/lesson/Adaptation-and-Evolution-of-Populations-MS-ES/?conceptCollectionHandle=earth-science-%3A%3A-adaptation-and-evolution-of-populations&collectionCreatorID=3&collectionHandle=earth-science
https://www.ck12.org/c/earth-science/adaptation-and-evolution-of-populations/studyguide/Adaptation-and-Evolution-of-Populations-Study-Guide/?collectionHandle=earth-science&collectionCreatorID=3&conceptCollectionHandle=earth-science-%3A%3A-adaptation-and-evolution-of-populations
https://www.ck12.org/biology/population-growth-in-biology/rwa/Invasion-Down-Under/?referrer=concept_details
https://www.ck12.org/c/biology/biogeography/lesson/Biogeography-BIO/?referrer=concept_details
https://www.ck12.org/c/life-science/insect-reproduction/lesson/Insect-Reproduction-and-Life-Cycle-MS-LS/?conceptCollectionHandle=life-science-%3A%3A-insect-reproduction&collectionCreatorID=3&collectionHandle=life-science
Reptiles
https://www.ck12.org/c/life-science/reptiles/lesson/Reptiles-MS-LS/?referrer=concept_details
http://www.bio.utexas.edu/courses/evolution/amniobiogeo.pdf
Understanding evolution
https://www.ck12.org/c/biology/amphibian-evolution-and-ecology/rwa/A-Great-Leap-To-Speciation/?referrer=concept_details
Amphibians
https://www.ck12.org/c/biology/amphibian-structure-and-function/lesson/Amphibian-Structure-and-Function-BIO/?referrer=concept_details
https://www.ck12.org/c/biology/amphibian-reproduction/lesson/Amphibian-Reproduction-and-Development-BIO/?conceptCollectionHandle=biology-%3A%3A-amphibian-reproduction&collectionCreatorID=3&collectionHandle=biology
Birds
https://www.ck12.org/c/life-science/birds/lesson/Birds-MS-LS/?referrer=concept_details
https://www.ck12.org/c/life-science/birds/lecture/Birds-Vertebrates/?referrer=concept_details
Mammals
https://www.ck12.org/c/life-science/mammals-overview/lesson/Mammal-Characteristics-MS-LS/?referrer=concept_details
https://www.ck12.org/c/biology/mammal-reproduction/lesson/Mammal-Reproduction-MS-LS/?collectionHandle=biology&conceptCollectionHandle=biology-%3A%3A-mammal-reproduction&collectionCreatorID=3
Energy Pyramid
https://www.learner.org/courses/essential/life/session7/closer5.html
https://www.ck12.org/assessment/tools/geometry-tool/plix.html?eId=SCI.BIO.404&questionId=533ded035aa41307737c77a4&artifactID=1824158&conceptCollectionHandle=biology-::-ecosystems&collectionCreatorID=3&plix_redirect=1
Biodiversity
https://www.ck12.org/c/biology/sources-of-genetic-variation/lesson/Sources-of-Genetic-Variation-Advanced-BIO-ADV/?referrer=concept_details
https://www.ck12.org/c/earth-science/adaptation-and-evolution-of-populations/lesson/Adaptation-and-Evolution-of-Populations-MS-ES/?conceptCollectionHandle=earth-science-%3A%3A-adaptation-and-evolution-of-populations&collectionCreatorID=3&collectionHandle=earth-science
https://www.ck12.org/c/earth-science/adaptation-and-evolution-of-populations/studyguide/Adaptation-and-Evolution-of-Populations-Study-Guide/?collectionHandle=earth-science&collectionCreatorID=3&conceptCollectionHandle=earth-science-%3A%3A-adaptation-and-evolution-of-populations
https://www.ck12.org/biology/population-growth-in-biology/rwa/Invasion-Down-Under/?referrer=concept_details
https://www.ck12.org/c/biology/biogeography/lesson/Biogeography-BIO/?referrer=concept_details