Which of the following statements is true?
A) The process of respiration is critical for maintaining the freshwater pools on Earth's surface.
B) Transpiration moves saltwater to the atmosphere and then to freshwater pools on Earth's surface.
C) About 2.5 percent of Earth's water is fresh at any given time.
D) Glaciers make up about 20 percent of Earth's freshwater pool.
E) An aquifer is a pool of freshwater perched over the base groundwater that is accessible by humans.
Answer: C
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A researcher creates a mutant pea plant in which cytokinins are over-expressed and gibberellic acid is under-expressed. What is the most likely phenotype of this mutant pea plant?
A. The pea plant would be shorter with more branches compared to wild-type plants. B. The pea plant would be taller with more branches compared to wild-type plants. C. The pea plant would be shorter with fewer branches compared to wild-type plants. D. The pea plant would be taller with fewer branches compared to wild-type plants.
Most basidiomycetes are autotrophs that decompose plant debris, especially cellulose and lignin.
Answer the following statement true (T) or false (F)
What is the advantage of the highly condensed state of the DNA of mitotic chromosomes?
a) The condensed state allows replication to occur more rapidly as the cell enters mitosis. b) The highly condensed state favors delivery of an intact package of DNA to each daughter cell. c) The condensed state favors DNA repair prior to mitosis. d) This state allows gene expression needed during mitosis. e) The condensed state allows chromosomes to fuse more easily.
Where are you most likely to find bacteria belonging to the domain Archaea?
A. a pond B. in a hot spring C. a beer production facility D. a human's large intestine E. a sewage treatment plant