What accounts for the fact that regions near the equator tend to be warmer than other regions on Earth?
O A. The sun's rays transfer less heat per square kilometer near the
equator.
O B. The sun's rays strike Earth's surface at an angle near the equator.
O C. The sun's rays are concentrated in a smaller area near the equator.
O D. The sun's rays are spread over a larger area near the equator.
SUBMIT

tissue

explanation:

it is actually formed by geoup of cells which is tissue

if the type of the food available changes, then the frequency of beak types will change, because birds with beaks more suited to the available food will be more successful over time.

"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."