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

Anisogamy

Anisogamete, is a condition where the gametes an organism possess are varied in their size but have almost identical features and shapes. This phenomenon occurs to serve the sexual reproduction of two species; a male and a female to produce and create an offspring. 

Cotton was the very first

Leaves specifically the gas exchange between plants and the environment. while plants undergo photosynthesis, they also partake in cellular respiration. respiration is the process that happens in the leaves of plants.