en biology khanacademy 5/5 (1)

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46,829 views

Covers topics seen in a first year college or high school biology course.

Lessons

Introduction to evolution, variation in a population and natural selection More free lessons at: http://www.khanacademy.org/video?v=GcjgW
827 views

Ape Clarification - that they have no tails More free lessons at: http://www.khanacademy.org/video?v=oFGkY
850 views

The argument that evolution speaks to being the most "intelligent design" More free lessons at: http://www.khanacademy.org/video?v=qxOEz
817 views

Clarifying some points on evolution and intelligent design More free lessons at: http://www.khanacademy.org/video?v=nh1R-
835 views

How the "Owl Butterfly" may have gotten the spot on its wings. More free lessons at: http://www.khanacademy.org/video?v=dR_BF
967 views

An introduction to DNA More free lessons at: http://www.khanacademy.org/video?v=_-vZ_
799 views

How variation can be introduced into a species. More free lessons at: http://www.khanacademy.org/video?v=DuArV
758 views

The vocabulary of DNA: chromosomes, chromatids, chromatin, transcription, translation, and replication More free lessons at: http://www.khanacademy.org/video?v=s9HPN
772 views

Mitosis, meiosis and sexual reproduction. Understanding gametes, zygotes, and haploid / diploid numbers.
718 views

Explanation of the phases of mitosis. More free lessons at: http://www.khanacademy.org/video?v=LLKX_
718 views

The phases of Meiosis. More free lessons at: http://www.khanacademy.org/video?v=ijLc5
785 views

An overview of early development of a zygote to an embryo. Embryonic and somatic stem cells. More free lessons at: http://www.khanacademy.org/video?v=-yCIM
876 views

An introduction to what cancer is and how it is the by-product of broken DNA replication More free lessons at: http://www.khanacademy.org/video?v=RZhL7
716 views

Heredity and Classical Genetics. Dominant and recessive traits. Heterozygous and homozygous genotypes. More free lessons at: http://www.khanacademy.org/video?v=eEUvR
1,030 views

Dihybrid crosses. Independent assortment. Incomplete dominance. Codominance and multiple alleles. More free lessons at: http://www.khanacademy.org/video?v=D5ymM
820 views

Understanding allele and genotype frequency in population in Hardy-Weinberg Equilibrium.
760 views

Chromosomal basis for gender. Sex-linked traits. More free lessons at: http://www.khanacademy.org/video?v=-ROhf
776 views

Introduction to bacteria More free lessons at: http://www.khanacademy.org/video?v=TDoGr
709 views

Introduction to viruses More free lessons at: http://www.khanacademy.org/video?v=0h5Jd
693 views

Introduction to ATP or Adenosine Triphosphate
748 views

Introduction to cellular respiration, glycolysis, the Kreb's Cycle, and the electron transport chain
731 views

Taking a looking at oxidation and reduction in a biological context More free lessons at: http://www.khanacademy.org/video?v=orI2m
822 views

Oxidation and reduction in cellular respiration. Reconciling the biology and chemistry definitions of oxidation and reduction. More free lessons at: http://www.khanacademy.org/video?v=_KyyV
671 views

Overview of glycolysis More free lessons at: http://www.khanacademy.org/video?v=FE2jf
685 views

Overview of the Krebs or Citric Acid Cycle More free lessons at: http://www.khanacademy.org/video?v=juM2R
893 views

Overview of the Electron Transport Chain More free lessons at: http://www.khanacademy.org/video?v=mfgCc
738 views

Oxidative Phosphorylation and Chemiosmosis (along with slight correction of previous video) More free lessons at: http://www.khanacademy.org/video?v=W_Q17
957 views

Overview of photosythesis More free lessons at: http://www.khanacademy.org/video?v=-rsYk
742 views

Details on the light-dependent reactions of photosynthesis More free lessons at: http://www.khanacademy.org/video?v=GR2GA
882 views

More detail on the light reactions and photophorylation More free lessons at: http://www.khanacademy.org/video?v=yfR36
720 views

The Calvin Cycle or the light-independent (dark) reactions of photosythesis More free lessons at: http://www.khanacademy.org/video?v=slm6D
714 views

More detail on the Calvin Cycle and Photorespiration More free lessons at: http://www.khanacademy.org/video?v=EQvTE
772 views

C-4 Photosynthesis: How some plants avoid photorespiration More free lessons at: http://www.khanacademy.org/video?v=7ynX_
778 views

How CAM Plants are able to fix carbon at night so they don't have to keep their stomata open during the day More free lessons at: http://www.khanacademy.org/video?v=xp6Zj
752 views

Parts of a cell: nucleus, ribosomes, endoplasmic reticulum, Golgi bodies, mitochondria, chloroplasts, vacuoles, and vesicles
714 views

Diffusion and Osmosis More free lessons at: http://www.khanacademy.org/video?v=aubZU
721 views

The pulmonary system including the lungs, larynx, trachea, bronchi, bronchioles, alveoli and thoracic diaphragm More free lessons at: http://www.khanacademy.org/video?v=SPGRk
710 views

Oxygen uptake by hemoglobin in red blood cells More free lessons at: http://www.khanacademy.org/video?v=fLKOB
777 views

Introduction to the circulatory system and the heart More free lessons at: http://www.khanacademy.org/video?v=QhiVn
736 views

Hemoglobin and its role in the circulatory system More free lessons at: http://www.khanacademy.org/video?v=LWtXt
706 views

Introduction to the neuron and its anatomy More free lessons at: http://www.khanacademy.org/video?v=ob5U8
950 views

How a sodium potassium pump can maintain a voltage gradient across a cell or neuron's membrane More free lessons at: http://www.khanacademy.org/video?v=C_H-O
804 views

Correction to Sodium and Potassium Pump Video More free lessons at: http://www.khanacademy.org/video?v=ye3rT
719 views

How electrotonic and action potentials propagate down cells
688 views

How one neuron can stimulate (or inhibit) another neuron at a chemical synapse More free lessons at: http://www.khanacademy.org/video?v=Tbq-K
726 views

How myosin and actin interact to produce mechanical force. More free lessons at: http://www.khanacademy.org/video?v=zopoN
793 views

Tropomyosin and troponin and their role in regulating muscle contraction. How calcium ion concentration dictates whether a muscle is contracting or not. More free lessons at: http://www.khanacademy. ...
806 views

The role of the sarcoplasmic reticulum in controlling calcium ion concentrations within the muscle cell More free lessons at: http://www.khanacademy.org/video?v=SauhB
659 views

Understanding the structure of a muscle cell More free lessons at: http://www.khanacademy.org/video?v=uY2ZO
699 views

Role of phagocytes in innate or nonspecific immunity. Neutrophils, macrophages, and dendritic cells. MHC II. More free lessons at: http://www.khanacademy.org/video?v=O1N2r
854 views

Overview of types of immune responses. Difference between innate and adaptive immunity. Differences between humoral adaptive immunity and cell-mediated adaptive immunity. More free lessons at: http ...
714 views

Overview of B cells (B lymphocytes) and how they are activated and produce antibodies More free lessons at: http://www.khanacademy.org/video?v=Z36dU
703 views

How professional antigen presenting cells present parts of engulfed pathogens on MHC II complexes (major histocompatibility complexes). More free lessons at: http://www.khanacademy.org/video?v=j_kSm ...
751 views

Introduction to helper T cells and their role in activating B cells More free lessons at: http://www.khanacademy.org/video?v=uwMYp
636 views

How cytotoxic T cells get activated by MHC-I/antigen complexes and then proceed to kill infected cells More free lessons at: http://www.khanacademy.org/video?v=oqI4s
634 views

Review of B cells, CD4+ T cells and CD8+ T cells More free lessons at: http://www.khanacademy.org/video?v=xaz5f
681 views

Overview of the inflammatory response More free lessons at: http://www.khanacademy.org/video?v=FXSuE
676 views

Overview of how the nephrons in the kidney filter blood and reabsorb water and other molecules. More free lessons at: http://www.khanacademy.org/video?v=cc8sU
599 views

Secondary Active Transport in the Nephron More free lessons at: http://www.khanacademy.org/video?v=czY5n
745 views

What a species is and isn't. Ligers, tiglons, mule, hinnies, and dogs More free lessons at: http://www.khanacademy.org/video?v=Tmt4z
824 views

The science of taxonomy and where humans fit into the tree of life More free lessons at: http://www.khanacademy.org/video?v=oHvLl
976 views