The advantage to using vapor collection instead of the syringe when testing samples for hydrocarbons is the vapor collection is less expensive and less time consuming
the vapor method increases the sensitivity of the test
the syringe is easily contaminated by the surrounding air
the vapor method is less likely to start another

Match the type of adaptation to the correct example, structural adaptation functional adaptation behavioral adaptation example type of adaptation elephants live in herds to protect their young leaves of a rain forest plant species have a pointed tip that enables rainwater to drain off easily. camels have nostrils that they can close snakes produce venom to kill prey and defend themselves. earthworms coil when touched, as part of a defense mechanism. human skin darkens with increased exposure to sunlight.

Why are common names a problem for scientist?

Atest cross can be used to -predict the phenotypes of a monohybrid cross -predict an unknown genotype of a purebred dominant plant -cross-breed dominant and recessive plants -give probabilities that a trait will appear