Mrs. Stroberg wants to make sure every student passes Biology. She thinks that if she pays some students that they will study more for tests and quizzes and get higher
scores. So she decides to pay half the students $20 a week to put in more time to study
for any test or quiz. After a month, she looks at all the test and quiz scores and notices
that the average score on every test and quiz are the same in both groups.
What was the dependent variable?
The students that are paid
The students that are not paid
The money
The test or quiz scores

What was the land like over 500 million years ago? what was under the sea?

Knowing the importance of the essential elements, why would someone chose a diet that does not address all of them?

Archeologists have discovered three sites showing conclusive evidence for the mastery of fire in tanzania, from a period slightly after the time that homo habilis was present in africa. these sites clearly were founded by homo erectus, the descendent species of homo habilis that migrated north, out of africa and into asia. homo erectus was known to have mastered fire, from ample evidence at sites in asia. there is no reason to attribute mastery of fire to homo ergaster, the descendent species of homo habilis that remained in africa.which of the following is an assumption on which the argument depends? (a) before their migration, homo erectus occupied african territory as far south as tanzania.(b) the strain of migration provided the selective pressure motivating homo erectus‘ mastery of fire.(c) homo ergaster would not have derived as much benefit from the mastery of fire as did homo erectus.(d) homo ergaster inherited all cultural knowledge from homo habilis, a species that did not have mastery of fire.(e) homo ergaster did not occupy regions as far south as tanzania until well after the time of these three sites.