Each element on the periodic table is defined by __________________, which is also known as the atomic number.
A. the number of protons
B. the number of neutrons
C. the number of electrons
D. the total number of protons and neutrons
E. the mass number
Ans: A. the number of protons
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Examine Figure 44.29 in your text. According to this phylogeny, the group marked "Bony fish" is
A. monophyletic. B. paraphyletic. C. polyphyletic. D. diphyletic. E. none of these.
Boiling is very effective at removing most common waterborne pathogens
Indicate whether this statement is true or false.
Predict the most immediate consequence of the inflammation of the pleural sac in a human.
A. Gas exchange would decrease. B. Lung volume would decrease. C. Respiratory muscle activity would decrease. D. Hemoglobin's oxygen affinity would decrease.
What structure prevents water from moving between cells of the endodermis of the plant root?
a. Casparian strip b. Okazaki fragments c. sclerids d. collenchyma e. sclerenchyma