Erwin and scott used an insecticidal fog to knock down insects from the top section of a l. seemannii tree. the researchers identified over 900 species of beetles among the individuals that fell. erwin also projected that this entire tree from top to bottom is host to about 600 arthropod species that are unique to this tree species and not found on any other tree species. there are approximately 50,000 species of tropical trees. although it could not be entirely accurate, what would be the best way to estimate the total number of arthropod species?

The options to complete the question are

A. Multiply 900 by 50,000.

B. Estimate the species density and then multiply by 50,000.

C. Divide 900 by 600 and then multiply by 50,000.

D. Multiply 600 by 50,000.

The CORRECT ANSWER IS D

D. Multiply 600 by 50,000.

"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."

in a chemical reaction, the atoms and molecules produced by the reaction are called products. no new atoms are created, and no atoms are destroyed. in a chemical reaction, reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products.