B. They often interact with each other
Radiocontrast agents are
substances such as barium sulfate and iodine administered to a patient to
improve the real time imaging of dynamic processes in blood vessels, or
peristalsis in the gastro intestinal tract. These agents work by absorbing
external X-rays that cause low exposure on the X-ray detector.
I think that it will have 24 because I thought that you had 2 multiply it by 2
<h3><u>Answer</u>;</h3>
Key
A sorting device that is useful in classifying by observation is a <u>key</u>.
<h3><u>Explanation</u>;</h3>
- <em><u>Classification key or taxonomic key is a device that is used by scientists to identify unknown organisms. </u></em>
- They are constructed so that the user gets a series of choices about the characteristics of the unknown organisms.Thus, by making the correct choice at each step, one is led to the identity of the specimen.
- Therefore<u><em>, keys can be used to identify a living organism or determine which group it belongs to</em></u> by answering questions on the key about characteristics of living things.
The answer is C the enforcement clause