After reading the passage about acupuncture, identify which scientific claim explains why some people say acupuncture does not truly relieve pain. It blocks pain channels.
It is unclear how it works.
It provides only a placebo effect.
It is ancient medicine, not modern medicine.

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?

When are the centromeres broken in meiosis?

One student group hypothesized that the dry baker's yeast must be alive.the temperature change, odor, and bubble foation, they said, indicated whych characteristic of life