Bipolar neurons have axons and dendrites extending in opposite directions. Development begins during weeks seven through eight of embryology. Many are specialized sensory neurons for various senses
Principle states allele and genotype frequencies remain constant in populations without evolution. Hardy and Weinberg independently demonstrated it mathematically in 1908. Principle applies to diploid organisms with equal sex frequencies
Bicycle gearing determines the relationship between pedaling speed and wheel rotation. Modern bicycles typically have multiple gears for different riding conditions. Cyclist's legs produce power optimally within narrow pedaling speed range
The ear consists of three main parts: outer, middle, and inner ear. The outer ear includes the auricle and ear canal, which naturally produces earwax. The middle ear contains three ossicles that transmit sound vibrations. The inner ear contains the cochlea for hearing and the vestibular system for balance
Yin and Yang represents inseparable contradictory opposites in Chinese philosophy. Principle dates from 3rd century BCE or earlier. Opposite forces attract and complement each other
Libra is the seventh zodiac sign focused on partnerships and relationships. Ruled by Venus, symbolized by the Scales constellation. Represents balance, harmony, and social leadership. Season begins September 23, ends October 22