08:34

Intro to Macromolecules (CHONP, Monomer vs Polymer) General bio. (Updated)

13:12

Carbohydrates - General Biology (Updated)

09:05

Lipids - General Biology (Updated)

10:16

Nucleic Acids - General Biology (Updated)

18:46

AP biology - Water potential

21:51

Cell Organelles Updated AP biology topics 2.1 & 2.2

16:19

Carbohydrates AP Biology Topics 1.4 & 1.5 (Updated)

13:13

Elements of Life & Monomer vs Polymer (AP Bio topics 1.2 & 1.3)

15:27

Properties of Water (Updated) AP Biology Topic 1.1

14:44

Community Ecology

14:55

Cycles of Matter (Water, Carbon, and Nitrogen Cycles)

05:49

Energy Pyramids

07:18

Food Chains, Food Webs, Trophic Levels

08:27

Autotrophs vs Heterotrophs (Producers, Consumers, Decomposers)

07:43

AP Bio Topic 7.12 Variation in Populations

15:02

AP Bio Topic 7.13: Origins of Life on Earth

06:09

Retroviruses

08:27

Polymerase Chain Reaction

10:08

Gel Electrophoresis

09:51

AP Biology Topic 5.6 Chromosomal Inheritance

03:51

AP Biology Topic 5.3 Laws of Probability: Rule of Addition

11:17

AP Biology Topic 5.5 Environmental Effects on Phenotype

10:49

AP Biology Topic 5.4: Nonnuclear Inheritance

01:07

AP Biology Unit 3 Workbook now available!

11:11

AP Bio Topic 3.4 Metabolic Pathways & Energy (Updated)

07:44

AP Biology Topic 3.7 Fitness

13:32

How Circulatory and Respiratory Systems Interact

15:02

AP Bio Topic 2.8 Hypertonic, Isotonic, Hypotonic Solutions

10:03

AP. Bio Topic 2.8 Osmoregulation

10:02

Primary vs Secondary Succesion (AP Bio Topic 8.5 Community Ecology Part 4)

05:10

Symbiosis (AP Biology Topic 8.5 Community Ecology Part 2)

14:29

8.7 Disruptions to Ecosystems (Part 2)

15:32

AP Biology Topic 8.7 Disruptions to Ecosystems (Part 1)

11:27

AP Biology Topic 8.6 Biodiversity

05:02

General Overview/Purpose of the Calvin Cycle

05:45

AP Biology Topic 8.5 Community Ecology Part 3: Simpson's Diversity Index

13:19

AP Bio Topic 8.5 Community Ecology Part 1: Competition, Niche Partitioning, Predator Prey

22:01

AP Bio Topic 8.3 and 8.4 Population Ecology Exponential & Logistic Growth

04:07

AP Bio Topic 8.2 Energy Pyramids (8.2 Part 3)

14:20

AP Bio Topic 8.2 Trophic Levels (8.2 Part 2)

04:18

Dihybrid Crosses & The Rule of Multiplication

15:12

AP bio 8.2 Endotherms vs Ectotherms (8.2 Part 1)

08:12

AP Biology Topic 7.11 Extinction

05:42

Divergent Evolution & Adaptive Radiation (AP Bio Topic 7.10)

04:31

Gradualism vs Punctuated Equilibrium (AP Biology Topic 7.10)

07:14

AP Biology Topic 7.8 Continuing Evolution (Mainly Antibiotic Resistance)

13:04

AP Bio Topic 7.9 Part 2 Constructing Phylogenetic Trees

12:01

AP Biology Topic 7.9 Phylogeny part 1: Understanding Phylogenetic Trees

20:01

20 minute timer Nature Themed (desert, Joshua Tree)

17:56

AP Bio Topic 7.6 Evidence for Evolution & 7.7 Common Ancestry

15:00

15 Minute Timer Nature Themed

10:00

10 Minute Timer Nature Themed

03:00

3 minute timer Nature Themed

05:00

5 miute timer Nature Themed

16:07

AP Bio Topic 8.1 Part 2: Response to the Environment - Communication

14:48

AP Bio Topic 8.1 Behavioral & Physiological Responses to the Environment (Part 1)

09:42

Convergent Evolution (AP Bio Topic 7.3)

04:29

Artificial Selection (AP Bio Topic 7.3)

04:19

Cell Specialization Intro

03:22

DNA vs RNA