Last Minute Lecture

Plant Senescence and Programmed Cell Death — Regulation, Hormones, and Developmental Roles | Chapter 24 of Plant Physiology and Development Chapter 24 of Plant Physiology and Development (Sixth Edition) provides a comprehensive and modern look at two essential processes in plant biology: senescence and programmed cell death (PCD) . Far from being signs of decline or cellular failure, both processes are highly regulated, genetically programmed, and crucial for plant development, nutrient recycling, and survival under stress. This blog post expands on the concepts introduced in the Last Minute Lecture video, offering a clear, accessible, and academically grounded explanation suitable for both students and researchers. To follow along with the full explanation, watch the complete video lecture below: What Is Senescence in Plants? Plant senescence is a tightly controlled developmental program, not a passive breakdown of tissue. It involves coordinated changes in metabolism, ge...

Aging, Health, and Lifestyle in Adulthood — Summary of Chapter 20 from The Developing Person Chapter 20 of The Developing Person Through the Life Span explores the biosocial development that takes place throughout adulthood, with a particular emphasis on how aging, health behaviors, and lifestyle decisions impact long-term well-being. While the aging process—known as senescence —is inevitable, this chapter shows that the way we age is profoundly influenced by genetics, habits, and socioeconomic status (SES). 🎥 Watch the full chapter summary above and subscribe to Last Minute Lecture for podcast-style chapter breakdowns of major psychology texts. The Biology of Aging Aging begins earlier than most people realize. Senescence refers to the gradual decline of the body’s systems—including organ reserve, homeostasis, and allostasis. This decline varies widely among individuals, depending on both intrinsic and extrinsic factors. Key physical signs of aging include: Wrink...