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Overview of types of immune responses. Difference between innate and adaptive immunity. Differences between humoral adaptive immunity and cell-mediated adaptive immunity.

Understanding the structure of a muscle cell

Video 1: Explores what angles are
Video 2: Provides examples of angles
Video 3: Misconceptions about angles

This video explores the angles found in parallel lines.

DNA is made up of two strands. Each strand has a backbone made up of alternating sugars and phosphate groups. The two strands are linked by complementary nitrogenous bases. The strands are oriented in opposite directions, making the structure "antiparallel".

Binary fission, budding, mitosis, fragmentation, parthenogenesis and sexual reproduction.

These three short online lessons discuss asteroids, comets and meteors.

Introduction to bacteria

Patterns and processes of evolution. How evolution and natural selection are reflected in the similarities and differences of organisms. 

Breaking down photosynthesis into light dependent reactions and Calvin cycle..