Which of the following statements is true about scientific theories?
1.A theory is a related set of hypotheses that form a broad-ranging explanation of many phenomena.
2.Theories can not be rejected.
3.Once established, theories can not change.
4.Scientists must not change their minds and replace theories in light of new evidence.
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Describe reproduction in the sea star.
What will be an ideal response?
Are any of these vegetables actually fruit?
A. Sugar beets B. Corn C. Carrots D. Celery E. All of these are vegetables, none of them are fruit. Clarify Question What is the key concept addressed by the question? Gather Content What do you already know about fruit? What other information is related to the question? Choose Answer Given what you now know, what information is most likely to produce the correct answer? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
In thermodynamic studies, energy changes are analyzed in a collection of matter called a ________. All other matter in the universe is called the ________.
Fill in the blank(s) with the appropriate word(s).
An important source of vitamin K in the intestine comes from which species?
A) Helicobacter pylori B) Streptococcus mutans C) Vibrio cholerae D) Giardia lamblia E) Escherichia coli