Question

The question on the pic

3. [This question is based on a real study, but I've changed things.] Researchers caught over 300 female anoles (lizards) and randomly divided them into two groups. One group had their ovaries removed ("ovariectomy"), so they cannot reproduce. The other group didn't have anything done to them. All the anoles were released back into the wild. (12 pts) 100% a. Do this experiment suggest that wild anoles experience a tradeoff? yes no Circle one, and explain. ovariectomy Ono procedure 75% anoles still alive 50% 25% a 0% Sept next May May ovariectomy / no procedure / can't tell b. Which anoles group likely has higher fitness? Circle one, and explain. c. It is not clear whether the observed difference is due to the presence of ovaries, or the surgical procedure itself (anesthetizing, cutting, and patching each anole). What treatment group could you add to distinguish these two hypotheses? d. Suppose the researchers used your answer to partC as a third group. Add (fake) data to the graph from this new group that would suggest the presence of ovaries caused the difference in the "ovariectomy" and "no procedure" treatments.

Answer 1

1. No, there was no tradeoff tradeofAfter the theethe two groups. Those anoles who cannot reproduce was not balanced with those of the with no procedures.
2. Anoles in whom ovariectomy was done was suspected to have more fitness because their population who still lives was better than the anoles in whom the procedure was not done. This can suggest that the procedure was somehow influencing their fitness.
3. Inorder to check whether the removal of ovary was the reason for their fitness, confirmation could have been done with the help of comparing it with a male anole. If the male organ is removed and if the same effect is seen as in females then it can be due to the influence of anaesthetic, cutting and patching. And no much difference in the population number then we can conclude that in females the stability was due to removal of ovary was the reason.
4. In selecting male anole from the graph we get the conclusion that after vasectomy there was no much difference in the fitness of male anoles. This specifically urges that female anoles in which the ovariectomy was done was the reason behind the higher fitness.