A scientist finds a fossil that she thinks might make a good index fossil. Which characteristics does this fossil most likely have? Select two options
A: It is the remains of an organism still found alive today.
B: It is the remains of an organism that was alive for only a short time.
C: It is the remains of an organism that is found in abundance nearby.
D: It is the only fossil for this type of organism that has ever been found.
E: It is the remains of an organism that lived in a narrow geographic area.

What is the primary goal of human communities?

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?

The specific heat of ice is 0.5 calories/gram°c. 20 grams of ice will require ll calories to raise the temperature 1°c. 05