Question 3 (2 points)
why is dna replication (copying) described as semi-conservative?
1.)when dna copies itself, the new dna strand is made up entirely of the old
dna base pairs.
2.)when dna copies itself, it only copies some of its base pairs.
3.)when dna makes a copy of itself, the new dna strand does not have any of
the original dna bases pairs.
4.)when dna copies itself, the new dna strand has half of the bases of the
original strand.

Recent research by marine biologists suggests that bottlenose dolphins have names for themselves. scientists played sounds they had identified as the names of particular dolphins, putting them through a synthesizer so that they did not sound like the voices of particular dolphins. the researchers found that dolphins would respond to the names of other dolphins that they were related to or associated with, but they ignored the names of strangers. this discovery suggests a much greater degree of self-awareness in aquatic mammals than was previously suspected. if this research holds up, what does it suggest about dolphins?

Radiometric dating is used to tell the absolute age of materials by studying the decay rate of radioactive isotopes. the decay rates of isotopes are constant and are expressed as .

What is the difference between a scientific hypotheses and a scientific theory?