According to the theory of sea-floor spreading, oceanic islands, such as the Hawaiian Islands depicted in the figure above, form as oceanic crustal plates move over a stationary "hot spot" in the mantle
Currently, the big island of Hawaii is thought to be over a hot spot, which is why it is the only one of the seven large islands that has active volcanoes. What should be true of the island of Hawaii?
1. Scientists in search of ongoing speciation events are more likely to find them here than on the other six large islands.
2. Its species should be more closely related to those of nearer islands than to those of farther islands.
3. It should have a rich fossil record of terrestrial organisms.
4. It should have species that are not found anywhere else on Earth.
5. On average, it should have fewer species per unit surface area than the other six islands.
A) 1, 2, and 3
B) 1, 2, and 5
C) 1, 2, 3, and 4
D) 1, 2, 4, and 5
D
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Which of the following types of experimental evidence suggests that a particular organism thought to be part of the human microbiome is, in fact, just a laboratory contaminant?
A. Absence of ribosomal RNA evidence in a specific host location where the organism was not expected to have colonized B. Absence of ribosomal RNA evidence in a specific host location where the organism was believed to have colonized C. Presence of ribosomal RNA evidence in a specific host location where the organism was believed to have colonized D. Presence of ribosomal RNA evidence in a specific host location where the organism was not expected to have colonized
Margarine is made by hydrogenating vegetable oils so that they take on the consistency of butter. Propose a chemical basis for this change from a liquid to a solid
A. Hydrogenation of fats changes them from saturated to unsaturated, which are more solid. B. Trans-fatty acids are changed from unsaturated to saturated, allowing them to solidify. C. Trans fatty acids are changed from saturated to unsaturated, allowing them to solidify. D. Hydrogenation of fats changes them from unsaturated to saturated, which are more solid.
Which of the following accurately represents the relationship between the terms anabolism, catabolism, and
metabolism? a. anabolism = catabolism b. metabolism = catabolism c. catabolism = anabolism + metabolism d. anabolism = catabolism + metabolism e. metabolism = catabolism + anabolism
Which is the correct order of events that occurs when a DNA gene is being used to make RNA in a eukaryotic cell?
Recognize and bind, terminate, capping and editing, transcribe Recognize and bind, capping and editing, terminate, transcribe Recognize and bind, transcribe, terminate, capping and editing Recognize and bind, transcribe, capping and editing, terminate Transcribe, terminate, recognize and bind, capping and editing