A 35-year-old male, Fred Dead, comes into your emergency room seeking treatment. Before any doctor can examine him, and medical tests can be run, or any treatment can be administered, he dies in the emergency waiting room. You are the doctor that has been assigned to investigate his case. You perform a routine examination of the body but find nothing wrong or out of place. You think an autopsy should be performed to determine the man’s cause of death. Mr. Dead’s family is unsure of whether this is a necessary step and will not allow an autopsy to be performed. You must write a letter to the family explaining the rationale for an autopsy in which you try to convince them that an autopsy should be performed on Mr. Dead. In your letter, use appropriate evidence and scientific reasoning to support your argument.

Which feature of a human community is similar to a niche in a biological community

Juan and carol were studying invertebrates in biology. they knew that segmented or earth worms preferred a dark, moist habitat. during this lab, they would be investigating the responses of organisms called planaria or dugesia tigrina. these were simple flatworms that still had a one-way digestive system and a very simple nervous system. juan and carol placed the planaria in a petri dish containing cool, distilled water that was partially covered with black paper. they shined a light on the dish. next, they removed the paper and placed a small amount of chicken liver at one end of the dish. they added a few large salt crystals to the water. finally, they added drops of hot water to the cool water in the petri dish. their results can be seen in the data table. according to their experiment, all but one conclusion is valid.

Substances that can pass through cell membranes by diffusion include a. na ions. b. proteins c. glucose. d. oxygen.