The outermost germ layer of an embryo is damaged during development. This is likely to affect which of the following? (2 points) Formation of the skeletal and muscular systems
Formation of the respiratory and digestive systems
Formation of the nervous and integumentary systems
Formation of the circulatory and nervous system

It is used to during sexual reproduction between humans

The proton has a positive charge while the neutron has no charge they both make up the nucleus of the atom while the elections have a negative charge and surround the nucleus of the atom. the protons and electrons are used to calculate the atom's mass whereas the neutrons don't affect the mass

1) the mayans built pyramids just like the egyptians. the mayans also used hieroglyphics like them.2) power was passed down by family. for example, if the father dies, the son would be the next king.3)they both built pyramids for their structures.4)the main crop for the mayans was maize.5)they also grew manioc, beans,  squash,  amaranth, and chile peppers.