Which of the following is an example of parasitism? a. clownfish defending sea anemone from other predators b. hookworms consuming blood from inside an animal's intestine c. barnacles living harmlessly on the side of a whale while collecting food d. tree frogs using the trees to hide from predators

The correct answer would be b. hookworms consuming blood from inside an animal's intestine.

Parasitism is a type of biological interaction in which an organism (parasite) lives on or inside the body of the other organism (host).

Parasites can be of two types:

Parasites do not kill their host but they harm their host and withdraw nutrients from them.

Hookworms are bloodsucking endoparasites which live in the intestine of an animal.

the transfer of energy between two molecules spaced just nanometers apart plays a key role in many technologies, including photovoltaics, quantum information systems, lighting, and sensors, as well as in biophysics to measure nanometer distances and in photosynthesis. but an open question in this area is what effect, if any, the surrounding photonic environment has on this nanoscale energy transfer. by designing and performing a carefully controlled experiment to answer this question, scientists have settled the debate and found clues to improving the efficiency of many of the technologies that rely on this process.

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