I think Earth’s atmosphere plus atmosphere. So, 23+48=71. So, the answer is A
Answer:
Through anaerobic biochemical rraction
Explanation:
Just my best
Answer:
cells?
Explanation:
it would help if you gave the options :)
Answer:Wildebeest are considered keystone species because their presence has myriad effects on the ecosystem, unlike those of any other species. Wildebeest are the "lawnmowers" of the Serengeti grassland. They keep grass short which in turn reduces the frequency of fires.
B is the only answer that correctly correlates to the question. Heterotrophs are organism that are not able to produce their own source of food. To acquire food, they depend on the organic molecules produced by producers.