01456cam a2200373 i 4500 650851170 TxAuBib 20120728120000.0 921021s1993||||||||||||||||||||||||eng|u 92039533 9780590472999 $14.95 0590472992 $14.95 9780590729239 paperback 0590729233 paperback (OCoLC)27149643 DLC eng rda DLC DVA BAKER BTCTA YDXCP LAKCL TxAuBib rda Cowcher, Helen. Whistling thorn / Helen Cowcher. New York : Scholastic, 1993. 34 unnumbered pages : color illustrations ; 28 cm. txt rdacontent n rdamedia nc rdacarrier Explains how the acacia evolved its own protection against browsing animals and helped create a balanced natural environment. AD630L Lexile. Decoding demand: 73 (high) Semantic demand: 90 (very high) Syntactic demand: 98 (very high) Structure demand: 82 (very high) Lexile. Accelerated Reader AR LG 3.7 0.5 11795. 20120728. Acacia Evolution Africa Juvenile literature. Acacia Ecology Africa Juvenile literature. Acacia. Ecology Africa. LAKCL