The endosymbiosis hypothesis proposes that a. a small cell lived inside a larger cell to the benefit of both cells. b. two cells merged into one cell, improving the enzyme function of the new cell. c. two separate cells worked cooperatively and one benefited from the other. d. a large cell engulfed and digested a smaller cell, exposing its enzymes for use by the larger cell. r

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?

Deer cave cannot support photosynthesis is as not enough sunlight is present. in spite of this, it still has a complex food chain. what is the energy foundation of this food chain?

Why are common names a problem for scientist?