Date Dale
Questions
22 19/2020
1. Define Somal cord? state its function?
2) Explain what happens of spinal cord is damaged?
3) What Hoyee structures protect the spind cord
co Dis kunguish blw ciemal nierue and spinal nerve Gruesos
5) Define reflex adion? steile its types?
1) Gue theee saamples of each of the following.
a) simple refled
b) conditional regelea
71 Compwe sympathelic and parasympathetic levar

In which of the following relationships is one organism always benefited while the other organism is always harmed

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.

What kinds of molecules can pass through the cell membrane without any problem?