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Chemical synapse
Chemical synapses are specialized junctions through which cells of the nervous system signal to one another and to non-neuronal cells such as muscles or glands. A chemical synapse between a motor ... > more -
Dinoflagellate
The dinoflagellates are a large group of flagellate protists. Some species, called zooxanthellae, are endosymbionts of marine animals and protozoa, and play an important part in the biology of coral ... > more -
Chloroplast
Chloroplasts are organelles found in plant cells and eukaryotic algae that conduct photosynthesis. Chloroplasts absorb sunlight and use it in conjunction with water and carbon dioxide gas to produce ... > more -
Circadian rhythm
A circadian rhythm is a roughly 24 hour cycle in the physiological processes of living beings, including plants, animals, fungi and cyanobacteria. In a strict sense, circadian rhythms are ... > more -
Frog zoology
About 400 million years ago, some members of the sarcopterygian group of fish moved onto land. These became the first amphibians. Today, these animals still spend part of their lives in water and ... > more
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