Because though there is a lot of available water, an ever shrinking 3% is freshwater, which comes from groundwater and streams. The ocean is salinated and in order for it to be fit to be used by humans for domestic needs or for drinking, it needs to undergo a huge desalination process which costs lots of money and time.
The processes of mitosis and meiosis performed in a multicellular organism are mitosis creates indentical genetic copies of cells and meiosis creates haploid gametes. this is what make multicelllar organisms grow larger and repair damage.
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Three different LTM kinds exist: Three types of memory exist: (1) semantic memory, which stores factual information, such as the distinction between afferent and efferent nerves; (2) episodic memory, which stores details of specific experiences.
Such as your first day of work; and (3) procedural memory, which stores instructions. While episodic memory is the recollection of specific facts, semantic memory is the recall of generic facts. The two categories of long-term memory are declarative memory and procedural memory. Declarative memory is the ability to recall events, facts, and data. The memory of how to perform things is referred to as procedural memory.
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They could need fresh water because some plants can't live in water but some of those plants are mangrove trees and other ?