The roots of most plants have root hairs near their tips. Researchers grew two types of plants, A and B, in soil with different concentrations of
phosphate ions. They measured the mean number of root hairs in a small area of the
roots, and also the mean length of the root hairs.

In which case would a scientist choose to use a dissecting microscope rather than a compound microscope

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?

Modern whales developed their traits through natural selection what occurs during the process of natural selection