I do believe that it is both naturally occurring and caused by human activity. Although science has proven that it is something that naturally progresses with time, humans have sped up the process. Hope this helps:)
Answer:
The first theories of matter were put forward by Empedocles in 450 BC, he proposed that all matter was composed of four elements - Earth, air, fire and water. Later, Leucippus and Democritus suggested matter was made up of tiny indestructible particles continuously moving in empty space.
Explanation:
Got it from google hope this help :))
Answer:
B)
Anaerobic respiration
Explanation:
All living organisms require energy for survival. They obtain this energy via the process of cellular respiration, where they breakdown the energy in their ingested food. However, the process of cellular respiration can either be aerobic (with oxygen) or anaerobic (without oxygen).
Anaerobic respiration is carried out by organisms who do not require OXYGEN for the process. This is the case of the bacteria described in this question which survive in a puncture wound that has healed on the outer surface of the skin in an environment without oxygen present. The type of respiration carried out by this bacteria is ANAEROBIC RESPIRATION.
Answer:
Explanation:
Anatomy. Species may share similar physical features because the feature was present in a common ancestor (homologous structures).
Molecular biology. DNA and the genetic code reflect the shared ancestry of life.
Biogeography.
Fossils
The main cause is fertilization. The fertilization cause high nitrates is the air
