What is a case of an environmental effect changing a phenotype? Caterpillars in cocoons under different colors of light develop different colored wings.

Caterpillars with both parents having red wings develop red wings.

Caterpillars that receive two recessive traits from parents develop no wings as a defect.

Caterpillars with a parent with red wings and another with blue wings develop purple wings.

i think the answer is b.

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.