Animal communication involves what type of sensory input?

Blood has traveled from the heart to the toes. which describes the next step of the circulation process?

The fish shown above is a tarpon. it is a fast-swimming and powerful open-water fish. its closest relatives, oddly, are burrow-dwelling conger eels that stay on the bottom. both eels and tarpon developed from snake-like larvae that float in the plankton during the first stages of life. once they mature, tarpon and eels are not found near one another in the ocean. the tarpon and the eel illustrate all of the following except

Which of the following is an eon in the time scale? phanerozoic proterozoic archean all of the above