A chemical change is a change in which the composition of the matter is changed at the molecular level, most chemical changes are not easily irreversible, for example, an egg being cooked, the egg changes from its liquid like state to a solid, and it is not possible to revert it back to its original change. The egg itself is changed in this case.
A physical change on the other hand however, is only changing the substance of a matter, not its composition, this is usually easily reversible. For example, water turning into ice, the water's substance changed from its liquid state to its solid state, it is still water, and it can easily be turned back into water by heating it.
Sorry for the long explanation,
Hope this helps!
Answer:
H:Mitochondrion (Mitochondria)
Explanation:
Answer: Annual high temperatures in the summer have increased over many decades.
Weather describe the state of the atmosphere for a short time period of a given place on the basis of chief atmospheric components like amount of precipitation, sunshine availability, direction and speed of wind, dryness and temperature. A weather represent fluctuations or short term changes in the atmosphere. Example of weather conditions are thunderstorm in hot summer, foggy month in autumn or other weather conditions describing typical region or season. Climate describes the long term atmospheric condition of a given place. Examples of climatic conditions are cold-dry desert and tropical climate.
Annual high temperatures in the summer have increased over many decades describes climate rather than weather because it gives idea about the long term atmospheric conditions of a region instead of a change for a short duration.
I believe the 3 main parts that make a virus would be its Nucleic content - DNA and or RNA, A protein coat surrounding the nucleic acid called a capsid, and the tail used for injecting viral genome into the host cell.
Restriction enzymes (restriction endonucleases)