Scientists once believed that tyrannosaurus rex dragged its tail along the ground. today, they know that t. rex did not drag its tail but held it aloft, above the ground. this change in scientific consensus happened because
a. scientists liked the idea that t. rex held its tail aloft better.
b. no one supported the idea that t. rex dragged its tail on the ground.
c. the idea that t. rex held its tail aloft is an emerging idea that replaced the old idea.
d. the idea that t. rex held its tail aloft was supported by the studies of many scientists.

If there are 350 trout found in 200 square feet of a pond measuring 1000 square feet what is the estimated trout population of the pond? a. 1350 b. 1550 c. 1750 d. 2000

This is the interaction of two organisms where one is and the other is neither nor harmed.

Describe the change in phase and temperature as water moves from the oceans to the atmosphere and then returns to earth again as rain. a) evaporation : temperature increases; condensation : temperature decreases; precipitation (rain) : temperature decreases b) evaporation : temperature increases; condensation : temperature decreases; precipitation (rain) : temperature increases c) evaporation : temperature decreases; condensation : temperature decreases; precipitation (rain) : temperature decreases d) evaporation : temperature increases; condensation : temperature increases; precipitation (rain) : temperature decreases