Question 13(1 point) A student was studying how a change in abiotic factors can influence living organisms. She set up the experiment as follow:
1. Fill two glass fish tanks, labeled Tank A and Tank B, with 5 liters of water each.
2. Add a small fish and several plants to each tank.
3. Seal both tanks so that no air can leave or enter.
4. Place Tank A in a bright room and Tank B in a dark room.
The student noticed after 45 hours, the fish in Tank B died while the fish in Tank A remained healthy. Based on the results of the experiement
described above, what is the best explanaion for why the fish in Tank A lived and the fish in Tank B died?
ООО
Fish died in Tank B due to lack of oxygen.
Fish died in Tank B because the tank was sealed.
Fish died in Tank B due to a lack of carbon dioxide
Fish died in Tank B because the temperature was too low.
d

hi~~

i would say that hybridization occurs frequently in nature, because there are many types of hybrids that have occurred naturally, such as the mule (male donkey + female horse)

"1. it should be, it has been for about 20 years, and it's really not much different in the end than breeding animals to have particular traits. there are always concerns about genetically engineered animals/plants affecting the environment in unexpected negative ways, but i can't think of an example where the fears didn't turn out to be baseless.  

first, as you point out, it would be a great advance in pharmacology, to be able to tailor drugs and their doses to me. the pros involve better medical treatment. the cons involve privacy issues like insurance companies denying coverage to people with genetic risk factors. looking at dna markers wouldn't affect the frequency of genetic diseases, but it would allow detection of them earlier. and ok, actually i suppose that if people used this information to avoid having children with genetic diseases, some might decrease in frequency."

c. is the correct answer