marine mammals, which are air breathers, can swim for hours at the surface of the water with minimal negative affect. If they dive deeper in the water for periods of time they are lost likley in pain. Explain why there would be such a difference?

Bookpagechapter letter sentence word1

Natural selection is mostly important evolution.for example.dinosur

Hello there.3. which type of muscle has muscle cells that connect to one another at junctions called intercalated disks? a. striated voluntary muscle b. nonstriated involuntary muscle c. striated involuntary muscle d. nonstriated voluntary muscleanswers:   striated involuntary muscle