The placenta is the site where antibodies in the mother's blood pass into the fetal circulation. these antibodies give passive immunity to the fetus for several common childhood diseases. there are some infections for which the mother does not provide antibodies to the fetus. what infection is the fetus not protected from?

Robert wants to know which fertilizer will work the best for his grass. what can he do to explore this inquiry?

What is the identity of the planets?

Subduction zones form when an oceanic plate collides with another oceanic plate or continental plate. the continental crust is lighter and less dense than oceanic crust. continental crust's density is approximately 2.7 grams per cubic centimeter. oceanic crust is thinner and the average density is about 3.3 cubic centimeters. when the two crustal plates converge the oceanic plate always bends and subducts beneath a continental plate. once the oceanic crust subjects, the rocks are subjected to changes in heat and pressure. because of this, we would expect to find rocks in the area of a subduction. a) clastic b) igneous c) metamorphic d) sedimentary