Which phrase best summarizes the theory of evolution by natural selection?

Parent organisms pass on traits they have acquired during their lifetime.

Life must come from other life.

Only the strongest animals survive.

Populations change over long periods of time. Ty for answering!

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?

What is the problem in this article? what solution does the article propose?

Which of these transport mechanisms moves glucose from the blood into a cell? active transport diffusion facilitated diffusion osmosis