Question

1. antonio is investigating how single - celled organisms move. using a microscope, he sees that one type of organism has a long, thin, tail - like structure that moves like a whip to move the organism forward. which of the following is the best model to relate his findings?

a. a report on single - celled organisms
b. a microscope image of the organism
c the string moves
d. a diagram of the organism that shows how it uses the tail - like structure to move

1. all fields of science use theories that allow scientists to make predictions. which of the following explains what happens to theories as new tools become available to scientists?

a. existing theories are replaced by new, better theories.
b. existing theories are revised to include new discoveries.
c. existing theories remain the same and new theories are added.
d. existing theories become laws when enough supporting evidence is obtained.

1. john dalton developed an atomic theory that described atoms as solid spheres that could not be divided. his theory also explained that atoms of one type of element are different from atoms of other types of elements. modern atomic theory explains that atoms are made up of smaller parts, but still keeps the idea that atoms of each element are unique. which of the following best explains why modern atomic theory is different from dalton’s theory.

a. dalton’s theory was never accepted by other scientists during his lifetime.
b. dalton’s theory was revised as new discoveries about the atom were made.
c. new experiments showed that a completely new atomic theory was needed.
d. scientists opinions of the atom changed as society became more advanced.

Explanation:

Question 26:

A diagram showing movement mechanism is most illustrative. A report is too general, a microscope image doesn't show movement, and "the string moves" is not relevant.

Question 27:

As new discoveries are made with new tools, existing scientific theories are revised to incorporate these new findings. They are not always replaced, nor do they simply remain the same or become laws in this context.

Question 28:

New discoveries about the atom led to the revision of Dalton's atomic theory, resulting in modern atomic theory which has differences from Dalton's original ideas.

Answer:

1. D. a diagram of the organism that shows how it uses the tail - like structure to move
2. B. Existing theories are revised to include new discoveries.
3. B. Dalton’s theory was revised as new discoveries about the atom were made.