In the last 100 years, which of the following have added excess carbon dioxide to the atmosphere? 1) power plants
2) machinery
3) cars
4) ALL OF THE ABOVE
pls answer asap, would be very appreciative:)​

Monomers are the building blocks of larger molecules, called polymers. for example, proteins are composed of chains of amino acids that are linked together. cellulose is a polymer that makes up plant cell walls. cellulose is made from a chain of c6h10o5 molecules. which monomers are most likely used to produce cellulose? why?

In an experiment examining the effects tai chi on arthritis pain, callahan (2010) selected a large sample of individuals with doctor-diagnosed arthritis. half of the participants immediately began a tai chi course and the other half (the control group) waited 8 weeks before beginning. at the end of 8 weeks, the individuals who had experienced tai chi had less arthritis pain that those who had not participated in the course.

People with one sickle cell allele are not likely to get malaria. what is this an example of?