Cells - The Building Blocks of Life Cells are the fundamental units of all living organisms. There are two main types of cells: prokaryotic and eukaryotic . Pro...
Cells are the fundamental units of all living organisms. There are two main types of cells: prokaryotic and eukaryotic.
Prokaryotic cells are small, simple cells that lack a true nucleus and membrane-bound organelles. They are found in single-celled organisms like bacteria.
Eukaryotic cells are larger and more complex, containing a nucleus and various membrane-bound organelles. These include:
Cells divide to grow, repair, and reproduce organisms. Mitosis is the process of cell division in eukaryotic cells, involving the separation of duplicated chromosomes into two identical nuclei. The cell cycle regulates this process.
Problem: A cell with a diameter of 2 micrometers (μm) is observed under a light microscope with a total magnification of 400x. Calculate the diameter of the cell's image.
Solution:
Living organisms are organized in a hierarchical manner, from cells to tissues, organs, and organ systems.
Plants have specialized tissues like xylem (transports water and minerals) and phloem (transports food). Transpiration and translocation are important processes in plants.
Non-communicable diseases, like coronary heart disease and cancer, are long-lasting conditions that cannot be transmitted from person to person.