Biết A quy định thân cao, a quy định thân thấp, trội lặn hoàn toàn. Cho cây có kiểu gen lai với cây có kiểu gen thu được F1. Ở F1 loại bỏ hoàn toàn các cây thân thấp, sau đó cho cáccây F1 giao phấn ngẫu nhiên. Tỉ lệ kiểu hình cao:thấp ở F2 là

African penguins, which inhabit the coasts of southern africa, were classified as an endangered species in 2010. two significant threats to their survival are ecosystem damage from oil spills and overfishing by humans. overfishing depletes the food supply of african penguins. the best method to reduce the threat of overfishing would be to . the risk of oil spills could be reduced by increasing the use of , which should oil consumption. if an oil spill does occur, could be used to remove the oil so the ecosystem may more quickly recover.

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Select the correct answer from each drop-down menu proteins are