Question

question 1 - 3
which of the following discoveries provides
evidence that supports the tenet of the cell
theory that states, “all living things are made of
one or more cells?”
adding a vacuum tube to electron
microscopes.
observing molecules moving through the cell
membrane.
viewing cells in a variety of plants and
animals.
watching a single - celled organism divide into
two organisms.

Explanation:

• The cell theory states that all living things are made of one or more cells.
• Viewing cells in a variety of plants and animals shows that different living organisms (plants and animals) are composed of cells, which directly supports the tenet that all living things are made of cells.
• Adding a vacuum tube to electron microscopes is about an improvement in microscope technology, not evidence for the cell theory tenet.
• Observing molecules moving through the cell membrane is about cell membrane function, not about the composition of living things being cells.
• Watching a single - celled organism divide is about cell reproduction, not about the general composition of all living things.

Answer:

Viewing cells in a variety of plants and animals.