a rigid layer of polysaccharides lying outside the plasma membrane of the cells of plants, fungi, and bacteria.

alive.

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

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

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

special human cells that have the ability to develop into many different cell types, from muscle cells to brain cells

a threadlike structure of nucleic acids and protein found in the nucleus of most living cells, carrying genetic information in the form of genes.

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

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

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 minute cylindrical organelle near the nucleus in animal cells, occurring in pairs and involved in the development of spindle fibers in cell division.

a plastid that contains chlorophyll and in which photosynthesis takes place.

the semipermeable membrane surrounding the cytoplasm of a cell.

the historic scientific theory, now universally accepted, that living organisms are made up of cells, that they are the basic structural/organizational unit of all organisms, and that all cells come from pre-existing cells.

a group of organs that work together as a biological system to perform one or more functions.

a biological agent that reproduces inside the cells of living hosts

the action or process of differentiating

a muscular organ located on the left side of the upper abdomen.

an organelle in the cytoplasm of eukaryotic cells containing degradative enzymes enclosed in a membrane.

deoxyribonucleic acid, a self-replicating material which is present in nearly all living organisms as the main constituent of chromosomes

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