New ecosystems have been created by human land use.
Please select the best answer from the choices provided

T
F

A60-tooth gear is connected to a 72-tooth gear.if the smaller gear turns 12 times,how many turns does the larger gear make?

What is the correct name for the animal pictured on the right? puma cougar panther mountain lion catamount

Influenza (the flu) is caused by a virus that attacks the respiratory system. which type of gene is most likely to be widely expressed in the body of someone who contracts the influenza virus? a the gene that controls the production of stem cells b the gene that controls the production of skin cells c the gene that controls the production of red blood cells d the gene that controls the production of white blood cells