Prophase: Definition and Stages
Prophase Definition Prophase is the starting stage of cell division in eukaryotes. Prophase, in both mitosis and meiosis, is recognized by the condensing of chromosomes …
Cell Biology
What is Prometaphase?
Prometaphase Definition Prometaphase is the stage of eukaryotic cell division that falls between prophase and metaphase. During prophase, the cell’s chromosomes have condensed and the …
Prokaryotic cell: Definition, Structure, and Characteristic
Prokaryotic Cell Definition Prokaryotic cells are cells that do not have a true nucleus or membrane-bound organelles. Organisms within the domains Bacteria and Archaea have …
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Prokaryote: Definition, Example, Evolution and Reproduction
Prokaryote Definition Prokaryotes are unicellular organisms that consist of a single prokaryotic cell. Prokaryotic cells are simple cells that do not have a true nucleus …
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Plant cell: Definition, Structure, and Types
Definition Plant cells are the basic unit of life in organisms of the kingdom Plantae. They are eukaryotic cells, which have a true nucleus along …
Phloem: Definition, Structure, and Function
Phloem Definition Phloem is the complex tissue, which acts as a transport system for soluble organic compounds within vascular plants. The phloem is made up …
Parenchyma Cells: Definition, Structure, and Function
Parenchyma Cells Definition In plants, parenchyma is one of three types of ground tissue. Ground tissue is anything that is not vascular tissue or part …
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Organelle: Definition, Function, Types & Example
Organelle Definition The term organelle is derived from the word ‘organ’ and refers to compartments within the cell that perform a specific function. These compartments …
What is Nuclear Membrane? | Nuclear Envelope
Nuclear Membrane Definition The nuclear membrane, also called the nuclear envelope, is a double membrane layer that separates the contents of the nucleus from the …
Nondisjunction: Definition, Types, and Example
Definition Nondisjunction occurs when chromosomes do not separate properly during cell division. This produces cells with imbalanced chromosome numbers. Chromosomes contain the cell’s DNA, which …