20 pts

a group of middle school students were given a short course in speed-reading. the instructor was curious if a monetary incentive would influence performance on a reading test taken at the end of the course. half the students were offered $5 for obtaining a certain level of performance on the test, the other half were not offered money.
what is the control group?
what is the independent variable?
what is the dependent variable?

Which of the following observation darwin shape his concept of descent with modification? a) species diversity declines farther from the equator. b) fewer species live on islands than on the nearest continents. c) birds live on islands located farther from the mainland than the bird's maximum nonstop flight distance. d) south american temperate plants are more similar to the tropical plants of south america than to the temperate plants of europe. e) earthquakes reshape life by causing mass extinctions.

What is the role of dna ligase in the elongation of the lagging strand during dna replication?

How do bacteria protect their genetic material and cytoplasm during harsh conditions