Protozoa and algae are examples of some of these simple organisms. Learn more about these one-celled organisms and their place in nature. Learn how protists are parasitic and live in colonies. Find out details about the many different types of protists with vivid microscopic images.
Keeping the requirements of teachers and researchers in mind, this encyclopedic dictionary presents the terminology in entomology and pest management in the most authentic and comprehensive way. It also includes terms related to the close relatives of insects, such as mites and ticks and some other organisms which are pests of crops.
1. Microorganisms (1674) Microscope lens grinder Anton Van Leeuwenhoek accidentally discovers microorganisms in a drop of water. He observes sperm, bacteria and red blood cells.
2. The Cell Nucleus (1831) While studying an orchid, botanist Robert Brown identifies a structure within the cells that he terms the "nucleus."
3. Archaea (1977) Carl Woese discovers bacteria are not the only simple-celled prokaryotes on Earth. Many of the organisms classified in the new kingdom of Archaea are extremophiles.
This text is designed for students and anyone else with an interest in the history of life on our planet. The author describes the biological evolution of Earth’s organisms, and reconstructs their adaptations to the life they led, and the ecology and environment in which they functioned. On the grand scale, Earth is a constantly changing planet, continually presenting organisms with challenges. Changing geography, climate, atmosphere, oceanic and land environments set a stage in which organisms interact with their environments and one another, with evolutionary change an inevitable result.
Horseshoe Crabs and Velvet Worms: The Story of the Animals and Plants That Time Has Left Behind
From one of the world’s leading natural scientists and the acclaimed author of Trilobite!, Life: A Natural History of Four Billion Years of Life on Earth and Dry Storeroom No. 1 comes a fascinating chronicle of life’s history told not through the fossil record but through the stories of organisms that have survived, almost unchanged, throughout time. Evolution, it seems, has not completely obliterated its tracks as more advanced organisms have evolved the history of life on earth is far older—and odder—than many of us realize.
