CBSE ENGLISH LANGUAGE & LITERATURE

Detailed explanation-1: -What groundbreaking research did Ebright do? Answer: working of body.

Detailed explanation-2: -He undertook many projects and experiments. He worked on viceroy butterflies to show that they copied monarch butterflies. He studied bright spots on the monarch pupa and discovered a new hormone. Also, he found out how cells read their DNA.

Detailed explanation-3: -His scientific contributions, discussed below, lay in several areas: the breeding habits of marine invertebrates; the fertilization reaction and the “fertilizin” theory of fertilization; the fast and slow blocks to polyspermy; and experimental parthenogenesis.

Detailed explanation-4: -So he did, and did he ever! Beginning in kindergarten, Ebright collected butterflies with the same determination that has marked all his activities. He also collected rocks, fossils, and coins. He became an eager astronomer, too, sometimes star-gazing all night.

Detailed explanation-5: -He discovered that these spots produced a hormone which helped in butterfly’s full development. Later, he proved that the absence of that hormone would make monarch a normal butterfly. He cultured the hormones and identified its chemical structure. It led to his theory of cell life.