an income sufficient to live on or the means of earning it.

inanimate; inorganic.

a theory in biology that includes one or both of the statements that the cell is the fundamental structural and functional unit of living matter and that the organism is composed of autonomous cells with its properties being the sum of those of its c

(of protozoans, certain algae, spores, etc.) consisting of a single cell

(of an organism or part) having or consisting of many cells.

the smallest structural and functional unit of an organism, typically microscopic and consisting of cytoplasm and a nucleus enclosed in a membrane. Microscopic organisms typically consist of a single cell, which is either eukaryotic or prokaryotic.

unicellular organisms that lack organelles or other internal membrane-bound structures. Therefore, they do not have a nucleus, but, instead, generally have a single chromosome: a piece of circular, double-stranded DNA located in an area of the cell c

organisms whose cells have a nucleus enclosed within membranes, unlike prokaryotes (Bacteria and Archaea)

he action or process of differentiating

peer-reviewed scientific journal publishing research papers across a broad range of disciplines within the life sciences.

any of the distinct types of material of which animals or plants are made, consisting of specialized cells and their products.

a part of an organism that is typically self-contained and has a specific vital function, such as the heart or liver in humans.

group of organs that work together as a biological system to perform one or more functions. Each organ does a particular job in the body, and is made up of distinct tissues.

an individual animal, plant, or single-celled life form.

special human cells that have the ability to develop into many different cell types, from muscle cells to brain cells. In some cases, they also have the ability to repair damaged tissues.

an infective agent that typically consists of a nucleic acid molecule in a protein coat, is too small to be seen by light microscopy, and is able to multiply only within the living cells of a host.

a member of a large group of unicellular microorganisms which have cell walls but lack organelles and an organized nucleus, including some which can cause disease.

a simple sugar which is an important energy source in living organisms and is a component of many carbohydrates.

he internal organ in which the major part of the digestion of food occurs, being (in humans and many mammals) a pear-shaped enlargement of the alimentary canal linking the esophagus to the small intestine.

dense organelle present in most eukaryotic cells, typically a single rounded structure bounded by a double membrane, containing the genetic materia

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