When the human diaphragm flexes, thoracic pressure increases. a. true b. false?

Texas bluebonnet plants seen in this photo are an example of which ecological unit?

Secondary pollutants are more harmful than primary pollutants. select the best answer from the choices provided ot of

Compare and contrast cladistics and phylogeny. what are their advantages and disadvantages? which is the most useful in understanding how an organism developed into its current form? which concept most strongly supports your opinion about the origin of any given organism?