Answer:Primary succession occurs on land that is new and has never had a flora and fauna example: glacier retreats, lava flows. Secondary succession occurs on land that has been cleared example: by fire, of flora and fauna, but which still has viable seeds and spores in the soil.
Answer:
The answers are: "Exploration", "Refined/Distilled" and "Companies"
Explanation:
When unrefined petroleum is removed starting from the earliest stage, should be shipped and refined into oil based goods that have any worth. Those items should then be moved to end-use buyers or retailers (like gas stations or the companies that conveys warming oil to your home). The general well-to-buyer inventory network for oil based commodities is frequently portrayed as being sectioned into three parts:
Upstream activities: include investigating for raw petroleum stores and the creation of raw petroleum. Instances of firms that would have a place in the upstream portion of the business incorporate organizations that own privileges to drill for oil (e.g., ExxonMobil) and organizations that offer help administrations to the boring section of the business (for example Halliburton).
Midstream activities: include the appropriation of raw petroleum to purifiers; the refining of unrefined petroleum into sale-able items; and the circulation of items to wholesalers and retailers. Instances of firms that would have a place in the midstream portion of the business incorporate organizations that transport oil by pipeline, truck or freight boat (e.g., Magellan Pipeline); and organizations that refine unrefined petroleum (e.g., Tesoro).
Downstream activities: include the retail offer of oil based commodities. Fuel stations are maybe the most obvious downstream organizations, yet organizations that convey warming oil or propane would likewise fall into this classification.
ATP adenosine triphosphate
Answer:
All angiosperms produce flowers, reproductive structures that are formed from four whorls of modified leaves. Most flowers have showy petals to attract pollinators, bribing insects and other animals with nectar, to get them to carry the male gametophyte through the air to another flower.
Answer:
Systemic gas exchange is the unloading of oxygen and loading of carbon dioxide