Richard was on a global trek to identify different species across the world. In his journal, Richard recorded an observation he made as “latitudinal variation in species richness.” Which statement describes the meaning of what Richard recorded in his journal? A.
He found more species as he moved from the equator to the poles.
B.
He found more species in the temperate zones.
C.
He found more species towards the western hemisphere.
D.
He found more species as he moved from the poles to the equator.
E.
He found fewer species in the southern hemisphere.

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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 picture represents a structure of the respiratory system. which is the function of this structure? to bring air into the body to exchange oxygen with carbon dioxide to carry air to the lungs to release oxygen from the body

Describe characteristics of a good respitory surface