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.
(d). Objects fall downward anywhere on the earth's surface regardless of the observer.
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The mouse is a particularly useful model for studying human disease because _____
a. mice and humans are 100% genetically identical b. all mice are in essence, clones c. mice do not feel pain and discomfort d. mice and humans are the only species whose genomes have been sequenced e. approximately 90% of human disease-associated genes are present in the mouse genome
Choose the letter of the best match from the following:A. protodermB. vascular cambiumC. apical meristemD. procambiumE. ground meristemUltimate source of all cells that contribute to growth in length of stem or root.
Fill in the blank(s) with the appropriate word(s).
Each of the following is a term reflecting a process involved in the migration of white blood cells except ________.
A. chemotaxis B. motility C. phagocytosis D. diapedesis E. vasodilation
The most important distinguishing feature of eukaryotes that is lacking in bacteria and archaea is ________.
A. the division of the cell into compartments that are bound by membranes B. the DNA replication mechanism C. the cell respiration process which is fundamentally different in bacteria and archaea D. the presence of a cell wall in eukaryotes