Angiosperms have seeds that are enclosed within an ovary (usually a fruit), while gymnosperms have no flowers or fruits, and have unenclosed or “naked” seeds on the surface of scales or leaves.
Gymnosperm seeds are often configured as cones.
3, 2, 4, 1
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<span>Cellular organization, Reproduction Metabolism, Homeostasis Heredity, Response to stimuli, Growth and development, and <span>Adaptation through evolution.
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<span>When a virus enters the cell of a human body it can start hosting inside the cell and reproduce itself. A virus can easily affect the body at the same time the immune system would activate to fight the viruses. Medication is needed to prevent it from spreading and worsen.</span>
Throughout our lives all of our bodily systems have cells that duplicate themselves. After a certain number of years, these cells begin to start dying off, or become more prone to mutations that occur in the cell replication process. An example is the eventual death of muscle cells that lead to reduced muscle tone and strength in the elderly. Concerning mutations in cell replication, the more times something happens the more chances there are that something can go wrong. If a cell has replicated itself twenty times, there has been little opportunity for something to go wrong, but when cells have replicated hundreds or thousands of times, pure odds mean the chances are greater for "mistakes". These mutations are what leads to certain diseases that are more greatly associated with aging, such as certain cancers.
