A type of diagram that shows how energy moves in a ecosystem is a food chain
Answer: New vaccines are offered each year because the virus changes.
Explanation: The flue viral strain constantly changes its genetic make up, a process called antigenic drift. As the virus replicates there are small changes that creates new strains which evolve to a completely different influenza virus requiring a new type of vaccine each year.
Answer:
<em>The option D) 'Every cell has a nucleus that contains genetic material' is not a part of the cell theory.</em>
Explanation:
The cell theory has three main postulates which are:
- All living things are made up of a cell or different cells.
- All cells arise from pre-existing cells
- Cells are the basic unit of life.
The cell theory does not claim that every cell shall have a nucleus. The prokaryotes lack a nucleus yet still are living things. However, all cells will have genetic material in the form of DNA or RNA.
I think it's Robert Hooke. I could be wrong, though:/
