Which of the following indicates when the tree was likely suffering drought stress?
1.The close location of two cycles of early wood shown in A.
2.The lack of xylem vessels in C.
3.The large vessels in the xylem shown in B.
4.The two series of xylem vessels close together shown in D.
2
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Consider the following two chemical equations:A
glucose + fructose ? sucrose + H2O, ?G = +27kJ/mole (or +6.5 kcal/mole) B. glucose + fructose + ATP ? sucrose + ADP + Pi, ?G = ?5kJ/mole (or ?1.2 kcal/mole) The free energy change difference between the chemical equations (A) and (B) above is accomplishedby:a. a decrease in activation energy. b. combining two endergonic reactions. c. combining an endergonic and an exergonic reaction. d. combining two exergonic reactions. e. measuring the reaction rate.
Species found in only one place on Earth are called ________ species
A) hot spot B) exotic C) keystone D) endemic
When compared to each other, the two replication forks that form at an origin of replication move in which direction?
A. in the 3'-to-5' direction B. in the 5'-to-3' direction C. toward the template strand D. toward the origin E. in opposite directions
An organism that uses CO2 for its carbon needs and sunlight for its energy needs would be called a/an
A. chemoheterotroph. B. halotroph. C. photoautotroph. D. heterotroph. E. saprobe.