What is a milestone for language development in one- to two-year-olds?
a. putting two words together
b. having words for almost everything around them
c. following directions and doing two things at once
d. understanding most of what is said by those closest to them

Language Milestones: 1 to 2 Years. Language milestones are successes that mark various stages of language development. They are both receptive (hearing and understanding) and expressive (speech). This means that in addition to being able to make sounds and words, your baby also needs to be able to hear and understand.

so D

Explanation:

"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."

the dna molecules have a negative charge because of the phosphate groups in their sugar-phosphate backbone, so they start moving through the matrix of the gel towards the positive pole. power is turned on and dna fragments migrate through gel (towards the positive electrode).

explanation: