LIFE SCIENCE

Detailed explanation-1: -the classical cell theory does not include this. but using either classical or modern theory, it is false that all cells have DNA surrounded by a nucleus. though prokaryotes (e.g. bacteria) contain DNA, they lack a nucleus. it is only in eukaryotes (e.g. animal cells) that the DNA is surrounded by a nucleus.

Detailed explanation-2: -The correct option is C All cells are surrounded by cell wall.

Detailed explanation-3: -The cell theory states that all living things are made of cells, cells are the basic units of structure and function of living things and that all cells come from other cells. Since, viruses are not made of cells and do not use cells in any of their processes, they are not related to the cell theory.

Detailed explanation-4: -Bacteria and other organisms therefore cannot arise spontaneously. So, the correct answer is ‘It states that bacteria and other small organisms can arise spontaneously’.

Detailed explanation-5: -All living things are composed of cells. Cells are the basic units of structure and function for living things. All cells come from pre-existing cells. Also, organisms grow by “adding on more cells” NOT by increasing the size of their cells.