How would a decline in the cactus population affect the rest of the desert ecosystem (i. e. other organisms such as rodents which feed on cactus fruit) (Hint: think trophic levels and food chain dynamics)

Imagine ? person stepping on a pin and pulling his or her foot way look at the réfléchir arc of the scenarios below

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 hematodinium parasite becomes less of a problem for the blue crab when the crab is very young. fishing is thriving in the region. the crab moves to less salty water. a significant percentage of the population is impacted.