The visits of the first robotic missions to the icy moons radically changed scientists’ conceptions of the suitability of these worlds to host life. Which of the following statements about this change in perception is true? Select each true statement (there may be several). A) Detection of radioactivity confirmed that […]

1. a hypothetical drug is administered which dilates blood vessels in the periphery (decreasing resistance) without directly affecting other tissues. Which of the following will occur as a consequence of administering this drug? a. an increase in blood pressure and an increase in cardiac outputb. an increase in blood pressure […]

1. What are some examples of arthropods? 2. What are the classes into which the phylum Arthropoda is divided? What are the three main classes and some of their representative species? 3. What are the main morphological features of arthropods? 4. In terms of germ layers and the presence of […]

Q1. A marine biologist has dredged up an unidentified animal from the sea floor A marine biologist has dredged up an unknown animal from seafloor. Explain some of the characteristics she must look at to determine the phylum to which animal have to be assigned. Describe how to determine if […]