Which gas makes up 78 percent of our atmosphere but can be used by plants only when transformed by bacteria first?
a. hydrogen
b. oxygen
c. carbon dioxide
d. nitrogen

The response is the basis for vaccination. primary secondary tertiary none of the above

The unique structure of the neuron is dedicated to the efficient and rapid transmission of neural signals. the relationship between neurons, the spinal cord, and the brain constitutes an elaborate communication system throughout the human body. all but one of the functions listed below are a result of this interaction.

Quick asap will give brainiest ! what best describes the same pattern of tides on earth throughout the day? neap tides spring tides semidiurnal tides nocturnal tides