Pleura membranes secrete mucus to reduce friction during breathing. What causes the friction during breathing?

Apaleontologist finds a plant fossil that shows that the plant had seeds. what can the paleontologist conclude?

State officials are considering constructing a road through a forested wilderness area. this action will likely affect the forest ecosystem in various ways. part a: predict how the construction of a road could negatively affect plants and animals in that ecosystem. (3 points) part b: describe one way that the construction of a road could have a positive impact of the forest ecosystem. (1 point)

Analyze how the water cycle affects a food web. now list 3 examples for each below using complete sentences, on how too much water would affect the same web? how about to little water?