You're discussing a forensic crime scene show your roommate, who insists that fingerprints are left behind due to the sebum on our fingertips. what do you tell him?

Fingerprints are left behind due to the sweat on our fingertips as well as sebum that sticks to or fingertips from our face and hair.

Explanation:

The ridges along the finger tips contain pores connecting to sweat glands. The sweat gland which is found in greater number in hands and feet is the eccrine gland. The sweat contains water in major amount and also contains lipids. Sebaceous glands on our face and hair secrete sebum.

When we touch our face and hair sebum sticks to the fingertips and the oily residue made by sweat and sebum coats our fingers. It is the residue and not just sebum on our fingertips that leaves a fingerprint when we touch a surface.  

emerald ash borer

the emerald ash borer is a green buprestid or jewel beetle native to north-eastern asia that feeds on ash species. females lay eggs in bark crevices on ash trees, and larvae feed underneath the bark of ash trees to emerge as adults in one to two years. hope this !

for  example, forests have higher evapotranspiration than other ecosystems,  such  as grasslands, because of their deeper roots and greater leaf area. thus forests have a net moistening effect on the atmosphere and become a moisture source for downwind ecosystems.