Which of the following characterizes the exoskeleton in arthropods? a. it is soft and flexible. c. it covers less than 50% of the body. b. it is composed of chitin. d. it provides protection from dehydration.

It's C, composed of chitin. That's what exoskeletons are commonly composed of to allow for some flexibility and support. 

The answer is atmosphere. there are four spheres of the earth: 1. geosphere (from greek word 'geo' = ground), 2. hydrosphere (from greek word 'hydro' = water), 3. biosphere (from greek word 'bio' = life), and 4. atmosphere (from greek word 'atmo' = air). a magnetosphere is a region of space around astronomical objects controlled by the magnetic field of that object. through the process of elimination, since lightning is present in the air, it can be found in the atmosphere.

The type of bond found in many carbon-to-carbon bonds in canola oil but very few carbon-to-carbon bonds in butter, is ; c=cc-c c=c c=h c-h hope this .