Mosasaurs were large marine reptiles that resembled a
cross between a crocodile and a giant iguana. The
mosasaurs are believed to have completely died out after a
huge asteroid impact caused Earth to drastically change.

Disinfection of impression materials is usually accomplished by a. sterilization with high heat. b. spray or immersion in a chemical disinfectant. c. sterilization with steam under pressure. d. allowing the impression to sit 24 hours in water until all the organisms die.

Identify the various levels of atmosphere. troposphere mesosphere exosphere stratosphere thermosphere

Cathy hypothesized that corn would not grow in mud. to test this hypothesis, she took corn kernels and placed 5 in mud, 3 in soil, and 2 in water. to her surprise, the kernels in the mud grew faster than the kernels in the soil. what error might have caused these unexpected results? a. wrong hypothesis b. not enough variables c. undefined control d. too many variables