Can someone please help me WILL MARK YOU BRAINLIEST !!
2 answers:
Answer:
The answer is A.Primary succession
Explanation:
Primary succession is an ecological succession that begins in essentially lifeless areas, such as regions in which there is no soil or where the soil is incapable of sustaining life (because of recent lava flows, newly formed sand dunes, or rocks left from a retreating glacier).
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Note: Question lack information. I have added full question with answer and explanation in info-graph.
Answer:
The cycle of human heart start with end of one beat to beginning of next beat is called cardiac cycle.
