Particularly at risk for waterborne pathogens are a. young children b. elderly persons c. patients who have hiv/aids d. persons taking steroids e. all of the above

(! ) what’s fracking and what does it have to do with carbon, carbon dioxide, or fossil fuels?

Coquina, a type of limestone, forms from shell fragments that settle on the ocean floor. what type of rock is coquina?

The table below shows the number of foot bones in some horse fossils. horse fossil recordhorse fossil number of foot bonesp 19q 17r 24s 13ancient horses had more bones in their foot then present-day horses. the present-day horse has 11 foot bones. what is the correct order of evolution of the horse starting from the youngest fossil? a. q p r s b. s r p q c. s q p r d. r p q s