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What is Intertidal zone? Define Estuary.

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What is Intertidal zone? Define Estuary. I ntertidal zone : O ceans are divided into zones. The shallowest part of the ocean ecosystem is called the intertidal zone. The  intertidal zone  is the area where the ocean meets the land between high and low tides. Estuary : The boundary where freshwater feeds into salt water is called an estuary . An  estuary  is an area where a freshwater river or stream meets the ocean.
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Revision work for chemistry Grade-8 2021.

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Define Pedigree and Carrier.

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Define Pedigree and Carrier. Pedigree: A pedigree is a chart used to trace the history of traits in a family. They are used to study   heredity patterns. Parents and offspring are shown in a pedigree.   Horizontal lines connect parents, and vertical lines connect parents to offspring. Males are represented as boxes ; f e mal e s ar e shown as circles. Individuals with a dominant trait have a shaded shape . Unshaded shapes represent recessiv e individu a ls . C arrier : A carrier is any individual who has inherited the gene for a trait, but does not show that trait  physically.
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