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1. bailey wants to find out which frozen solid melts the fastest: soda, ice, or orange juice. she
pours each of the three liquids into the empty cubes of an ice tray, and then places the ice tray in the
freezer over night. the next day, she pulls the ice tray out and sets each cube on its own plate. she
then waits and watches for them to melt. when the last part of the frozen liquid melts, she records
the time.
independent variable: soda, ice, or orange juice
dependent variable: how fast it melts
controlled variable: how long she waits, how much of each is used

Humans are believed to have evolved in coastal regions in east africa. the region had an abundant supply of fish for early humanoids to eat. when scientists analyze the fads gene they see an interesting pattern. people whose families have lived in this area of east africa for generation show a high level of diversity in alleles for the fads gene. conversely, people whose families had migrated inland a moderate distance from sources of fish showed a much lower diversity for fads gene alleles. additionally, the fads alleles found in people whose family has lived inland for generation are almost all gene alleles which produce fads proteins with a high level of function and activity. how do anthropologists explain this?

Up until 1938, paleontologists accepted the idea that coelacanths (an ancient fish) went extinct at the time that they last appear in the fossil record, about 80 million years ago. but in 1938, a live coelacanth was discovered off the coast of south africa that was compared to the fossil record and found to be the same species what goal of science does this discovery represent

What is the compliment dna strand to the following sequence: ttgactaggcta