Which of the following are functions of the respiratory system?

a
Warm air
b
Humidify air
c
Filter air
d
Absorb CO2 into blood

Aperson who uses a computer at a desk does not have to worry about safety in the workplace. true or false

The earth consists of a variety of different organisms. despite their diversity, however, some similarities on the structural and metabolic levels may be seen. these similarities can be attributed to a. similarities among organisms in their proteins and nucleic acids. b. the ability of organisms to readily adapt to sudden environmental changes. c. similarities in organisms' habitats and niches. d. the ability of all organisms to interbreed and produce new species.

What is thought to have caused the mass extinction at the end of the cretaceous period?