Question

which of these is not a principle of cell theory? 1 point cells are the basic units of structure and function all cells have a nucleus cells can only emerge from existing cells all living things are made of cells which of these is not a scientific theory to explain the origin of the first cells? 1 point rna world—a single molecule of rna took up a cell membrane hydrothermal vents—all cellular materials came from hydrothermal vents deep under the ocean steady state—cells have always existed since the beginning of the universe one pot—all cells came from one \proto - cell\

Explanation:

1. Cell - theory question: The cell - theory has three main principles: all living things are made of cells, cells are the basic units of structure and function, and cells can only emerge from existing cells. Prokaryotic cells do not have a nucleus, so the statement "All cells have a nucleus" is not a principle of cell - theory.
2. Origin - of - cells question: The steady - state theory is not a scientific theory for the origin of the first cells. The idea that cells have always existed since the beginning of the universe goes against the scientific understanding of the evolution of life. Scientific theories such as the RNA World, hydrothermal vents, and the one - pot (proto - cell) theories propose mechanisms for the origin of the first cells from non - living matter.

Answer:

1. B. All cells have a nucleus
2. C. Steady State—Cells have always existed since the beginning of the universe