A researcher wants to collect data about fetuses that were exposed to high levels of lead during their mother’s pregnancy. The researcher plans to review the medical records for a control group (not known to be exposed to high levels of lead) and an experimental group (exposed to high levels of lead) of fetuses from 12 weeks of gestation through delivery. Is this research permitted under Subpart B?.

20 points and brainlist 1. london has suffered from terrible air pollution for at least seven centuries. why is the city so prone to its famous “london fog? ” what did london do to get rid of its air pollution? 2. why does air pollution cause problems in developing nations more than in developed ones?

Punnett squares are used to show possible combinations of alleles or to predict the probability of a trait occurring in offspring. an incomplete dominance cross is performed between a bird that is homozygous for red feathers and a bird that is homozygous for blue feathers. purple offspring result. then, two of the purple offspring are crossed. according to the punnett square for this cross, how many of the offspring from the second cross will have a feather color that results from incomplete dominance? 1 in 4 2 in 4 3 in 4 4 in 4

Which statement is a physical property? becomes moldy quicklyeasy to digestconducts electricity poorlydoes not burn