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You cannot download interactives. A cell is one of the building blocks of life. Cells are membrane-bound groups of organelles that work together to allow it to function. Some of the major organelles include the nucleus, mitochondria, lysosomes, the endoplasmic reticulum, and the Golgi apparatus. Plant cells also include chloroplasts, which are responsible for photosynthesis. Use these classroom resources to examine how cells function with your students. An element is a substance that cannot be broken down into a simpler format. They are distinguished by a unique atomic number. The elements are organized by their atomic number in the periodic table, which highlights elements with similar properties.
Water is an example of a compound, a mixture of two or more elements, and is created when two hydrogen atoms bond to an oxygen atom. Use these resources to examine the properties and uses of elements and compounds. A cell is the smallest unit that is typically considered alive and is a fundamental unit of life. All living organisms are composed of cells, from just one unicellular to many trillions multicellular.
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Cell biology is the study of cells, their physiology, structure, and life cycle. Teach your students about cell biology using these classroom resources. A food chain outlines who eats whom. A food web is all of the food chains in an ecosystem. Each organism in an ecosystem occupies a specific trophic level or position in the food chain or web. Producers, who make their own food using photosynthesis or chemosynthesis, make up the bottom of the trophic pyramid.
Primary consumers, mostly herbivores, exist at the next level, and secondary and tertiary consumers, omnivores and carnivores, follow.
Chemosynthesis Definition and Examples
At the top of the system are the apex predators: animals who have no predators other than humans. Help your class explore food chains and webs with these resources. Plants are autotrophs, which means they produce their own food. They use the process of photosynthesis to transform water, sunlight, and carbon dioxide into oxygen, and simple sugars that the plant uses as fuel.
These primary producers form the base of an ecosystem and fuel the next trophic levels. Without this process, life on Earth as we know it would not be possible. We depend on plants for oxygen production and food. Learn more about this vital process with these classroom resources. Trophic levels provide a structure for understanding food chains and how energy flows through an ecosystem. At the base of the pyramid are the producers, who use photosynthesis or chemosynthesis to make their own food. Herbivores or primary consumers, make up the second level.
Secondary and tertiary consumers, omnivores and carnivores, follow in the subsequent sections of the pyramid.
At each step up the food chain, only 10 percent of the energy is passed on to the next level, while approximately 90 percent of the energy is lost as heat. Teach your students how energy is transferred through an ecosystem with these resources.
Chemosynthetic Ecosystems | Coastal and Marine Laboratory
A biotic factor is a living organism that shapes its environment. In a freshwater ecosystem, examples might include aquatic plants, fish, amphibians, and algae. Biotic and abiotic factors work together to create a unique ecosystem. Learn more about biotic factors with this curated resource collection. Skip to content Donate Account. Encyclopedic Entry Vocabulary. Kelp, hard at work supporting an entire marine ecosystem.
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Related Resources. Cell Functions Save to My Library. View Collection. Elements and Compounds Save to My Library. Cell Biology Save to My Library.
In , new types of autotrophs were discovered living around hydrothermal vents at the bottom of the ocean. These organisms, including the giant tube worm, convert energy from chemicals produced by these volcanic hot spots through a process called chemosynthesis. This process allows these organisms to use chemicals like sulfur or hydrogen to create sugars and amino acids, or the energy and materials that build up their bodies.
Chemosynthesis therefore allows organisms to live in places that were previously thought to impossible for life. The ability of these organisms to use chemicals instead of sunlight for energy radically changed our understanding of how and where life can thrive. Chemosynthesis is the creation of sugars from carbon dioxide and water without the need of sunlight.
Many organisms live in environments that don't have sunlight, and so chemosynthesis is their only source of energy. Also, chemosynthesis is a necessary step in the cycling of many elements that other organisms need to live and grow. For example, ammonia is poisonous to plants and animals; plants can't get the nitrogen out of ammonia that they need to make proteins.