According to jonah lehrer, what are the 4 types of cells that make navigation possible? describe each briefly: (need fast)

The image shows embryos of three vertebrate classes

(! ) what’s fracking and what does it have to do with carbon, carbon dioxide, or fossil fuels?

Which way do the nitrogenous bases in dna pair up? a. a and g; t and c b. a and c; t and g c. a and t; g and c d. a and a; t and t; g and g; c and c