The answer to your question is ''ice forming and then melting back into water''
Answer:
S.N. Characteristics Viruses
2 Cell Wall No cell wall. Protein coat present instead.
3 Ribosomes Absent
4 Number of cells No cells
5 Living/Non-Living Between living and non-living things.
Explanation:
Do NOT trust the link from the other user.
During aerobic respiration, complete oxidation of carbohydrates takes place. Glucose is broken down by oxygen to release energy, while carbon dioxide and water are the by-products of the reaction. The released energy is used to make a special energy molecule called Adenosine triphosphate (ATP).
All ecosystems contain biotic and abiotic parts, so answer d.