Most insects have small holes in the exoskeleton called which open and close to regulate air flow.
bronchi
alveoli
spiracles
trachea

As scientists have investigated evolution from a variety of fields, they have found that some of darwin's orginal ideas were inaccurate or incomplete. t explanation provided by evolution was updated each time to reflect the new information they found. what does this suggest about the theory of evolution? it has become a stronger and clearer theory as new information is collected.