The phases of Meiosis.
Explanation of the phases of mitosis
Mitosis, meiosis and sexual reproduction. Understanding gametes, zygotes, and haploid / diploid numbers.
Introduction to evolution, variation in a population and natural selection
Secondary Active Transport in the Nephron.
Introduction to bacteria
The Calvin Cycle or the light-independent (dark) reactions of photosynthesis.
Introduction to cellular respiration, glycolysis, the Kreb's Cycle, and the electron transport chain.
Clarifying some points on evolution and intelligent design.
Micturition (peeing) starts with urine flowing from the kidneys to the bladder via ureters. The bladder expands using transitional epithelium. Urine exits through the urethra, controlled by internal and external urethral sphincters. Ureters prevent backflow, thereby reducing infection risk