Researchers performed an experiment on young individuals of two species of savannah tree (Figure 21.18). They determined the temperature to which each tree was exposed at different height as well as the diameter of the tree, which they used as an index of resistance to fire, as larger diameters = thicker bark and greater resistance to fire. What do the data suggest with regards to adaptation to frequent fire? ordeal tree 650- • 0 D m O DOD 9 450- O Om DO DO 0O .. 0O O 00 O . O D0 250- 50- 20 40 diameter (mm) 60 80 rmonkey bread tree 650- 2 450- Do ob o 250- O DD OD • op 50- 20 40 60 80 B diameter (mm) Figure 21.18 Stems that survived (open squares) or died (black circles) after exposure to a particular temperature for both the ordeal tree (A) and the monkey bread tree (B). The line represents the regression of the estimated lethal temperature for each diameter, defined as the midpoint of the maximum diameter dead point and minimum diameter live point at each temperature. Trees over a certain diameter typically do not survive, no matter how hot the temperature gets. The monkey bread tree is not sensitive to temperature. Monkey bread trees are, on average, larger than ordeal trees. Ordeal trees over a certain diameter always survive, no matter how hot the temperature gets. Low temperatures, associated with quick-burning light wildfires, never kill these trees, suggesting adantation temperature ("C)

Poison is (Toxicodendron radicans) occurs as a weak free-standing shrub (that can reach 0.5m in height). as a trailing vine (that trails along the surface of the ground). and as a climbing vine (that climbs up trees and other vertical surfaces) When the a poison-ivs plant is growing as a weak shrub. Its stems are smooth, but when it begins to grow up the trunk of a tree. Its stem becomes covered with many slender adventitious roots that firmly attach it to the tree. Propose one possible proximate (immediate. physiological. ecological) factor and one possible ultimate (evolutionary ) factor for the production of adventitious roots br poison-ivy plants

ll AT&T M-Cell 7:44 PM Done A bartleby.com AA Your best friend Lily loves to hike, and she always seems to be telling you of her wild adventures running around in some park or another. A few months before school started, she was hiking on Bear Mountain in Connecticut, which is part of the Appalachian Trail. She said it was really cool because full blueberry bushes surrounded the trail. She also saw lots of deer while hiking. She tells you that the twin lakes near the mountain were refreshing to swim in. She is trying to talk you into going next year and shows you photos. In a photo of Lily on the mountain, you notice a rash on her leg. It has a red center, a blanched circular white area, and a red irregular circle around it. You ask her about it and she says that she did have a headache and muscle aches during the trip at the same time that she had the rash, but it all went away. 1. What do you think the rash was? 2. Lily needs to be tested for Lyme disease. How is this test performed?…

Q4: what is the correct answer