Which of the following best describes the usefulness of a simulation as an
experimental tool?
A. It is an exact substitute for a living thing or real-life event.
O
B. It is always easier to do than an actual experiment.
O
C. It can help predict the outcome of an event.
O
D. It allows a scientist to avoid making any observation of the natural
world.

The answer is it is an exact substitute for a living thing or real-life event.

Explanation:

Simulation is the process of imitation of the operation or system that represents its operation over time. it can be used to explore changes in a low risk environment. The simulation is used in many applications.

It is the re-creation of a real world process in a controlled environment. They are used for scientific exploration, for safety tests, and to create graphics for video games and movies.

Simulation software is used to design equipment because the product will be close to design without expensive in process.

The simulation process comes under three types live, virtual, and constructive.

Live: simulation involving real people operating real system

virtual: simulation involving real people operating simulated system.

Constructive: simulation involving simulated people operating simulated systems.

The cell wall is thick and fibrous and provides a barrier between the cell and its external environment.

Explanation:

A cell wall is an important layer which envelops a plant cell. It is present just outside the cell membrane. It can be tough, rigid or flexible. It is a thick layer that is composed of cellulose fibers. It exhibit holes which are called as plasmodesmata that allows the movement of the substance in and out of the cell. It prevents the loss of water due to external heat.