Owls have many anatomical modifications that enable them to hunt at night. For example, some of their feathers are serrated on the edges, which eliminate the noise created by air flowing over a smooth feather surface
Owls can thus descend on their prey without a sound. They can locate small prey with remarkable accuracy, even in dim light or complete darkness. Experiments conducted in totally dark, soundproof rooms have shown that owls can capture prey after pinpointing its location to within 1.5 degrees in both horizontal and vertical planes.
Based on this scenario, which of these structures do owls primarily rely on when they hunt in total darkness?
A) Olfactory bulb
B) Umami receptors
C) Mechanoreceptors
D) Photoreceptors
E) Nociceptors
C
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During a sequencing reaction, the researcher adds all the required components to the reaction, but
accidentally adds only one of the four dideoxynucleotides, the ddC. What kinds of products will be observed after this reaction is complete?
a. All fragments will end in A. b. All fragments will end in C. c. All fragments will end in G. d. All fragments will end in T. e. No fragments will be made.
What is a common limiting nutrient of phytoplankton?
a. Sunlight b. Nitrogen c. None of these choices d. Oxygen
Cilia
What will be an ideal response?
Which statement is an accurate interpretation of the outcome in an ecosystem when a major predator is removed?
A. The diversity of the ecosystem decreases because new herbivores move in. B. The diversity of the ecosystem decreases because parasites become more of a problem. C. The diversity of the ecosystem actually increases. D. The diversity of the ecosystem decreases since there is an increase in competition. E. The remaining community adjusts and quickly becomes stable.