If these organisms were arranged into an energy pyramid, which organism would have the least amount of energya: miceb: grassesc: rabbitsd: foxes

The correct answer is D. Foxes

Explanation:

10% law of energy transfer says that only 10 % of energy is available to be transferred in the next tropic level by previous trophic level and the rest of the energy will be lost as heat in the environment.  

So only 10 % of energy will be transferred from primary producer to primary consumer. Then the primary consumer will transfer 10% energy to the secondary consumers and so on. So organisms at a lower trophic level will get more energy than organisms of the upper trophic level.

So in this flow chart foxes are on the top of the trophic level as secondary or tertiary consumer, therefore, it will get the least amount of energy, therefore, the correct answer is D: Foxes.

"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."