Which of the following statement is based on scientific observation and reasoning?
(a). Some chemical compounds react differently in different human cultures.
(b). If a tree falls in a forest but this is never witnessed by a human, there are no physical or biological consequences.
(c). Many physical and biological phenomena lack any cause-and-effect; outcomes from one situation may be one way today and another tomorrow.
(d). Objects fall downward anywhere on the earth's surface regardless of the observer.
(e). A scientist records only the data that are easiest to interpret.
Answer: (d). Objects fall downward anywhere on the earth's surface regardless of the observer.
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The greatest danger of pneumothorax is ___________
Fill in the blank (s) with the appropriate word.
Which Kingdom of organisms is most noted for its ability to carry out photosynthesis?
A. Animilia B. Protista C. Fungi D. Plantae E. Bacteria
In which type of connective tissue are the proteins dissolved in a liquid matrix?
a. bone b. elastic cartilage c. hyaline cartilage d. adipose e. blood
Which of the following statements about a gram-positive cell wall is false?
A) It maintains the shape of the cell. B) It is sensitive to lysozyme. C) It protects the cell in a hypertonic environment. D) It contains teichoic acids. E) It is sensitive to penicillin.