What invertebrate animals are the ancestors of tetrapods A)jellyfish

B)cartilaginous fish

C)jawed fish

D)jawless fish

Which greenhouse gas is emitted when burn fossil fuels for energy? a.nitrogen b.oxygen c.carbon dioxide d.helium

If a force of 40 newtons moves a cart a distance of 9 meters, the work done is nm. if the same force moves the same cart three times that distance, the work done is nm.

If the charge that enters each meter of the axon gets distributed uniformly along it. true or false