Biological clock - the subject matter of the science of chronobiology as a temporary organization of biological systems and processes.
Basic concepts and indicators
• biological rhythm - a chain of repeating a sequence of changes of a biological indicator
• the period of the cycle - the cycle time or the time interval between two repeating rhythmic starting points of the curve
• frequency - the number of cycles per unit time,
Maths and Geometry
When solving the roots of polynomials, the goal is to make the expression equal to zero. Practice examples of math problems with polynomials with help from a standardized test prep instructor in this free video on math and education.
Expert: Brian Leaf
Contact: www.brianleaf.com
Bio: Brian Leaf, MA, is the author of McGraw-Hill's Top 50 Skills for SAT/ACT Success series and has instructed SAT, ACT, GED and SSAT preparation to thousands of students.
Filmmaker: David Pakman