Acondition in which the gametes are similar in shape but different in size is isogamy anisogamy oogamy

The correct answer for the fill in the  blank is Anisogamy.

Anisogamy is also termed as heterogamy. It is a form of sexual reproduction in which fusion of two gametes that are different in size and/ or form takes place.

It explains the differences that occur between males and females. Due to the difference in the size of gametes, physiological and behavioral differences take place in two sexes that explains the concept of sexual dimorphism.

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.

explanation: