The biosphere is composed of the parts of Earth where life exists. It includes the dark environment of the ocean's deep trenches, the rainforests and high mountaintops. Bacteria, protozoa and up to 30 million species of animals, plants and fungi are included in the biosphere.Know More
Although the biosphere is a life-supporting global ecosystem, it comprises a relatively thin part of Earth's surface. The biosphere measures approximately 12 miles from top to bottom, but almost all life exists between 1,640 feet below the ocean's surface to 3.75 miles above sea level.
Some ancient prokaryotes developed a way to convert carbon dioxide and water to make simple sugars. Over time, these photosynthetic organisms helped change the biosphere so that new forms of life could exist. The biosphere has existed for 3.5 billion years and is a large ecosystem comprised of many smaller ecosystems.
The biosphere is characterized by the continuous cycling of matter, and water is a major factor. The flow of solar energy helps maintain the structure of organisms, and the elements carbon, hydrogen, nitrogen, oxygen and sulfur combine with proteins, lipids and nucleic acids to form the building blocks of life. Biosphere reserves exist to help people establish and maintain a balanced relationship with the natural world.Learn more in Biology
The parts of the mushroom are the cap, gills or pores, spores, stem, ring, volva, mycelium and hypha. The mushroom can be divided into underground and aboveground sections.Full Answer >
According to Colorado State University, the parts of a leaf can be divided into internal features and external features. The internal features of a leaf include the epidermis, the cuticle, leaf hairs, the palisade layer, chloroplasts, the vascular bundle, spongy mesophyll, the stomata and guard cells. The external features include the leaf blade, the petiole and the stipules.Full Answer >
Life processes are the series of actions that are essential to determine if an animal is alive. Living things have seven essential processes in common: movement, respiration, sensitivity, growth, reproduction, excretion and nutrition. All things fall into one of three categories: living, used to be living or not living; the presence of all seven life processes indicates a living thing.Full Answer >
The sun is almost entirely composed of hydrogen and helium. Hydrogen accounts for about 75 percent of the sun's mass, with the other 25 percent being almost entirely helium. Other elements, such as oxygen and carbon, do exist in the sun, but at such low concentrations as to be insignificant.Full Answer >