<span>b. gravel on the bottom of the aquarium</span>
An ecosystem involves both the biological (plants, animals, human beings) and non-biological (land, water, soil, and atmosphere) community which interacts as a system. More importantly, the living things are very dependent on the abiotic community since it cannot survive by itself. Every animal, plant and human needs the primary physiological needs of water, food and shelter provided by the abiotic system. <span>
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Biotic factors:
Plants
Microorganisms
Macroorganisms
Explanation:
Mendelev wrote down a periodic table named mendelev periodic table. In his periodic table there were elements with similar properties occur at regular intervals. The tabular arrangement of elements on the basis of mendelev periodic table is calles mendelev periodic table.
This is all I know hope it helped! :D
Answer:
Usually landslides occur after a heavy rain fall because the soil becomes soft and the soil will begin to fall. Landslides can also occur after an earthquake because it would loosen the soil making it also easy to fall.
Answer: It is called DEMIFACET.
Explanation:
Demifacet is the half of the facet it is the medium heart shaped flat face where part of the head of rib or part of coastal cartilage articulates and it is usually found from rib 2 to 9. It is the superior of the demifacet that receive the head of the rib I.e the head articulate to it.