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Darwin's Observation (Fossils, Galapagos Islands & Africa ) and Natural Selection (Adaptive Traits)

By: HWC, Views: 7629

Along Darwin's voyage, he made many observations. Each one added to his understanding of how organisms change over time. Darwin was already familiar with fossils and knew that many fossils were very different from living organisms. But, also there were some fossils that were very similar to li...

Mechanism of enzyme action

By: HWC, Views: 7611

■ The substrate makes contact with the active site. ■ A change in the shape of the enzyme occurs resulting in the transformation of the substrate. ■ A substrate may undergo decomposition, have its atoms rearranged, or two substrates may be synthesized. ■ The products of the reaction...

Wound Repair Animation

By: Administrator, Views: 10741

A wound is an injury to living tissue caused by a cut, blow, or other impact, typically one in which the skin is cut or broken.

How to make cDNA Animation

By: HWC, Views: 2289

This animation shows how an mRNA transcript can be used to make a cDNA strand.

Shoulder Movement Animation

By: Administrator, Views: 686

Four muscles—the supraspinatus, infraspinatus, teres minor, and subscapularis—make up the rotator cuff. It stabilizes the shoulder and holds the head of the humerus into the glenoid cavity to maintain the principal shoulder joint.

Movement of Joints Animation

By: Administrator, Views: 421

Types of body movement that occur at the diarthrotic joints: - Abduction - Adduction - Circumduction - Dorsiflexion

Humerus Rotation Animation

By: Administrator, Views: 448

Types of body movement that occur at the diarthrotic joints: - Rotation - Supination

Classification of Joints Animation

By: Administrator, Views: 380

Types of body movement that occur at the diarthrotic joints: - Abduction - Adduction - Circumduction - Dorsiflexion Classification of Joints: - Synarthrosis (Fibrous) - Amphiarthrosis (Cartilaginous) - Diarthrosis (Synovial)

The life cycle of protein

By: HWC, Views: 7371

The life cycle of a typical protein begins with its synthesis on a ribosome. As the polypeptide chain grows, molecules of a chaperone protein bind along its length. This prevents misfolding of the nascent polypeptide. ATP binding causes chaperone release. For most proteins, the polypeptide th...