Answer
Answer:
Rivers often start from the mountain streams and contain high amounts of oxygen. Rivers and streams grow larger as these waters merge. Rivers pick up sediments from the land as they flow. Lakes support many varieties of organisms, including plants in shallow,
Answer:
D) Rare-earth elements
Explanation:
Rare-earth elements are elements that are highly limited in supply, may be depleted (used up) within a short time, and are difficult to replenish. Examples include neodymium, samarium, and yttrium.
Paper can be replenished by recycling old papers, while solar energy and water are renewable energy sources because we can not use them up within the foreseeable future.
Answer: Endoplasmic Reticulum
Explanation:
The Endoplasmic Reticulum is a network of interconnecting membrane enclosing channels that are continuous from outer outer nuclear envelope to plasma membrane. ER is classified into rough and smooth varieties.
The ER is very prominent in the cell activity synthesizing proteins e.g glycoproteins, lipoproteins and immunoglobins
new species will take their place
Explanation:
The frontier ethic assumes that saving endangered animal species may be considered foolish because new species will take their place. Frontier ethics suggests that the earth has an unlimited wealth of resources.
- The theory counters the sustainable ethics view to utilization of resources.
- Frontier ethics believes that if a resource becomes depleted in a part of the world, the earth will produce new ones to balance up.
- This is not economic or sustainable view to use of resources.
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