What are Stem Cells?

• What are stem cells?


  Stem cells are undifferentiated cells that can divide and differentiate into specialized cells.
• What are the two key features of stem cells?

  Stem cells can divide by mitosis and can differentiate into specialized cells.
• How do stem cells contribute to human development?


  They divide and differentiate to form all the specialized cells needed for a human organism.
• How does the differentiation capability of embryonic stem cells differ from adult stem cells?


  Embryonic stem cells can differentiate into any type of cell, while adult stem cells can only differentiate into a limited range of cells.
• What is the name of the single cell formed when a sperm fertilizes an egg?


  The single cell is called a zygote.
• What are embryonic stem cells capable of differentiating into?


  Embryonic stem cells can differentiate into any type of cell, such as nerve cells, skin cells, or blood cells.
• What type of stem cells are found in adult humans?

  Adult stem cells.
• Where are adult stem cells primarily found in the human body?


  Adult stem cells are found in bone marrow.
• What types of cells can adult stem cells differentiate into?


  Adult stem cells can differentiate into different types of blood cells, such as red blood cells, white blood cells, or platelets.
• What is the role of stem cells in maintaining health?


  Stem cells can replace damaged cells to keep the organism alive.
• Where are plant stem cells found?


  Plant stem cells are found in meristematic tissue.
• What is the significance of plant stem cells in growth?

  Plant stem cells differentiate into all the cells and tissues that the plant needs as it grows.
• What types of cells do plant stem cells differentiate into?


  They differentiate into palisade cells, phloem, xylem cells, and root hair cells.
• How long do plant stem cells persist in a plant's life?


  Plant stem cells persist for the entire life of the plant.
• What happens to embryonic stem cells as a human develops?


  Embryonic stem cells disappear by the time the human is fully developed.
• What are the main differences between embryonic and adult stem cells?


  • Embryonic stem cells can differentiate into any type of cell.
  • Adult stem cells can only differentiate into a limited range of cells.
  • Embryonic stem cells are present in early development, while adult stem cells are found in specific tissues.
• What is the process of human development from zygote to baby?


  1. Fertilization forms a zygote.
  2. Zygote divides by mitosis to form an embryo.
  3. Embryonic stem cells differentiate into specialized cells.
  4. After nine months, a baby is born.