C. The Bering Land Bridge once connected what would be Russia and North America but the the movement of these continents separated the land bridge
D.Elements continuously cycle between the physical environment and living organisms.
Ecosystem is encompassing all the life on earth in the physical environment that supports it. 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> </span>
The answer would be ( D. formation of cell walls)
Answer:
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Explanation:
ANSWER :
Ancistrus is a genus of nocturnal freshwater fish in the family Loricariidae of order Siluriformes, ... Historically, commonly available species of Ancistrus were Ancistrus cirrhosus and Ancistrus temminckii; other species are now available, though .
Explanation:
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