Coracias garrulus is a blue bird with an orange-brown
back. The offspring of this bird have an effective defense
mechanism. The young birds vomit and cover themselves in
a foul-smelling orange liquid when they sense a threat by
predators. Which two systems alert the young bird to the
danger and help produce the vomit it uses as a defense?
Excretory and reproductive systems
Integumentary and muscular systems
Nervous and digestive systems
d Immune and respiratory systems

The diagram below shows the layers of a rock having a trilobite: a rock column labeled rock is shown. the column has three layers. the bottommost layer of the rock has one shaded rhomboid shape, the middle layer has a rhombus with a diagonal along with two identical organisms marked as, trilobite, in the key, the top layer has two semicircles. a key is shown on the right side of the diagram. the shaded rhombus is marked as a, the rhombus with the diagonal is marked as b, the semicircle is marked as c which statement about the rock fossils is true?