Answer the following statements true (T) or false (F)
1. One gram of hydrogen, which has an atomic mass of 1, would have fewer atoms than 1 gram of carbon that has an atomic mass of 12.
2. Isotopes are different forms of the same element.
3. Sulfur 35 (35S) is an isotope of 32S. These elements differ in their number of neutrons.
4. Helium is an inert gas that rarely reacts with other elements because it has the maximum number of valence electrons in its outer shell.
1. FALSE
2. TRUE
3. TRUE
4. TRUE
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In the nitrogen cycle, the bacteria that replenish the atmosphere with nitrogen are _____
A) Rhizobium bacteria B) nitrifying bacteria C) denitrifying bacteria D) methanogenic protozoans E) nitrogen-fixing bacteria
Which of the following statements best defines cavitation?
A. Cavitation is the presence of air bubbles in the xylem. B. Cavitation is the presence of sugars in the xylem. C. Cavitation describes the process of xylem vessel collapse. D. Cavitation is the presence of ice in the xylem. E. Cavitation is the presence of pressure in the xylem.
Sea lions have shorter lactation periods than true seals
Indicate whether the statement is true or false
The light energy trapped by the antenna complex is used to
A. split water into H and O. B. produce CO2. C. generate ribulose. D. All of the choices are correct.