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  1. cell [ sĕl ] The basic unit of living matter in all organisms, consisting of protoplasm enclosed within a cell membrane. All cells except bacterial cells have a distinct nucleus that contains the cell's DNA as well as other structures (called organelles) that include mitochondria, the endoplasmic reticulum, and vacuoles.

  2. plant cell, the basic unit of all plants. Plant cells, like animal cells, are eukaryotic, meaning they have a membrane-bound nucleus and organelles. The following is a brief survey of some of the major characteristics of plant cells. For a more in-depth discussion of cells, see cell. Unlike animal cells, plant cells have a cell wall surrounding the cell membrane. Although often perceived as an ...

  3. plant cell. Most plant cells contain one or more membrane-bound vesicles called vacuoles. Within the vacuole is the cell sap, a water solution of salts and sugars kept at high concentration by the active transport of ions through permeases in the vacuole membrane. Proton pumps also maintain high concentrations of protons in the vacuole interior.

  4. Jan 5, 2023 · Topics covered include embryonic stem cells, pluripotency, germline stem cells, tissue-specific stem cells, stem cell differentiation, epigenetics, stem cell genomics and systems biology, genome reprogramming, cancer stem cells, stem cell niches, stem-cell-based disease models, nuclear transfer technology, bioengineering, drug discovery, in vivo …

  5. Meiosis has two cycles of cell division, conveniently called Meiosis I and Meiosis II. Meiosis I halves the number of chromosomes and is also when crossing over happens. Meiosis II halves the amount of genetic information in each chromosome of each cell. The end result is four daughter cells called haploid cells.

  6. Mar 31, 2021 · Cell Parts and Functions. All cells contain specialized, subcellular structures that are adapted to keep the cell alive. Some of these structures release energy, while others produce proteins, transport substances, and control cellular activities. Collectively, these structures are called organelles. Plant and animal cells both contain ...

  7. cell definition: 1. the smallest basic unit of a plant or animal 2. a small room with not much furniture, especially…. Learn more.

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