Biology glossary

Cell

A cell is the smallest living unit capable of autonomous function and constitutes the foundation of all living beings.It is bounded by a plasma membrane that protects the cell and controls exchanges with the outside.Inside, it contains …

Biologie cellulaire

Food chain

The food chain shows how energy and matter circulate in an ecosystem, moving from producers to consumers and then decomposers.Plants → Insects → Frog → Snake → OwlIn this chain:Plants are producers; they make their own food using sunlig…

Écologie

Chloroplast

The chloroplast is a membrane-bound organelle found in green plant cells. It contains chlorophyll, a pigment that captures sunlight and allows the transformation of light energy into chemical energy during photosynthesis.
Inside the c…

Biologie cellulaire

Chromosome

A chromosome is a thread-like, compact structure located in the nucleus of eukaryotic cells.It is made up of DNA wrapped around proteins called histones.Each chromosome carries many genes, which contain the instructions necessary for th…

Génétique

Contraception

Contraception includes all methods and means used to prevent pregnancy.It works by preventing the meeting of the sperm and the egg (fertilization), blocking the release of the egg (ovulation), or preventing the implantation of the embry…

Reproduction humaine

Cytoplasm

The cytoplasm is the gel-like substance, mainly composed of water, that fills the inside of the cell between the plasma membrane and the nucleus.It contains organelles, such as mitochondria or ribosomes, which perform various vital func…

Biologie cellulaire

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