Biology, 03.04.2020 00:35 dogerboy8380
The order Cetacea includes modern-day whales, dolphins, and porpoises. These marine mammals share common characteristics that have led scientists to make a conclusion about their evolutionary history. Cetaceans:
lack gills and must breathe air
give birth to live young rather than lay eggs
have fin bones that are similarly shaped to limb bones
have spines that flex up and down rather than side to side
The characteristics of cetaceans provide evidence that
A.
the bodies of their ancestors never changed.
B.
the theory of evolution is incorrect.
C.
they evolved from land mammals.
D.
they evolved from air-breathing fish.
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Answers: 3
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Abody cell has been growing and at synthesis proteins. in the nucleus of this body cell, dna replication is taking place. and a copy of the cells genetic material is copied. which of the following is the best conclusion you can make about the life cycle of this cell ? a) the cell is ready to undergo mitosis. and a chemical signal will send the cell to prophase b)the cell is undergoing meiosis and will cross over the genetic material next c)the cell is in the s phase of interphase and will move next to the g2 phase d) the cell is in the g2 phase of the interphase and is ready to begin diving
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The order Cetacea includes modern-day whales, dolphins, and porpoises. These marine mammals share co...
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