Movement of particles from a region of a high concentration to a region of low concentration
Flatworms have no need for circulatory and respiratory systems because they are able to actively diffuse oxygen through their skin and their body layout is such that they do not need to transport oxygen in order for it to get to their cells.
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An organism or type of living thing needs to obtain food, water, shelter and other things it needs to live, grow, and reproduce from its environment. An environment that provides the things an organism needs to live is called its habitat.
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Answer:
<u><em>The correct option is D) His results gave the first evidence that atoms were made up of smaller particles.</em></u>
Explanation:
Before the experiments performed by Thomson,scientists believed that atoms were the smallest particles with no sub units. The experiments performed by Thomson provided evidence that atom is made up of even smaller particles. The cathode ray experiment performed by Thomson led to the discovery of electrons which are the negatively charged particles of an atom. The protons are the positively charged particles of an atom. Whereas, the neutrons have no charge.
