Answer: One of the current problems that is going through out most of the entire world's water is polluted with trash .
Explanation: there
Answer:
The first layer (crust) is rock
The second layer (Mantel) Is molten rock
The third layer (outer core) is liquid iron and nickel
The fourth layer (inner core) is solid iron and nickel
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Answer:
Endangered species can be described as the species of animals or plants which are at the verge of extinction. Scientists tend to recognize the importance of every species in an ecosystem and make the world aware of the species which might go extinct. Nowadays, governments and citizens of a country pay much more attention to protect the endangered species.
Although, the wolves were a threat to some ecosystems but scientific researches have shown that these organisms can be beneficial in a number of ways. Hence, measures should be taken to protect these species. However, we can introduce species of wolves where the number of preys is more so that the ecosystem can be balanced.
Answer:
At 2 minutes the student's heart rates started to increase showing evidence of exercise.
Explanation:
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Answer:
Cyanobacteria
Explanation:
Cyanobacteria contributes to the origin of plants.
Scientists speculate that prokaryote engulfed a photosynthetic cyanobacterium that evolved into modern-day chloroplasts.
