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

What did the first language sound like

Most of the fossils found in virginia are in the coastal plain, valley, ridge, and appalachian plateau regions, best suggesting that these geographic provinces a) were once covered by seawater. b) are the oldest parts of virginia. c) have a great deal of karst topography. d) have large amounts of sedimentary rock.

Waianapanapa beach in hawaii is a black-sand beach that was formed by waves crashing against volcanic rock. the sand can be very hot on sunny days. which statement best explains why? o a. the black sand has no heat capacity. b. the black sand absorbs no radiation. o c. the black sand is immune to insolation. d. the black sand has a low albedo.