Are You Familiar with Pregnancy Indicators and hCG's Role?

Hormonal Changes in Fertilization

• Human Chorionic Gonadotropin (hCG) is secreted when an ovulated egg is fertilized and the embryo implants in the uterus.
• The presence of hCG in maternal blood and urine indicates pregnancy.

Consequences of Absence of Fertilization

• In the absence of fertilization, the hormone levels drop, leading to the shedding of the uterine lining, commonly referred to as menstruation.

Factors Affecting Plant Productivity

• The main factor affecting productivity in plants is nutrient availability, alongside light and water.

Properties and Roles of Water

• Water has several unique properties, including cohesion, adhesion, high specific heat, and solvent capabilities. Be aware of which properties may not apply if mentioned in context.
• The pH of pure water is neutral, specifically 7.
• Water plays crucial roles in plant cells, such as providing structural support, facilitating nutrient transport, and maintaining cell turgor pressure.

Biological Importance of Water

• Water's biological importance stems from its capacity to dissolve a wide range of substances, making it essential for biochemical reactions and cellular processes.