How does a nerve impulse cross the gap to another
nerve cell?

Transmission electron microscope are best for viewing a) microorganisms in pond water b) internal organs of a mouse c)internal structures of a cell d) surface features of a specimen

In general, characteristics that an organism survive and reproduce become more common over time. what mechanism of evolution causes this?

Which of the organisms listed below performs nitrogen fixation? a. legumes b. plants c. bacteria d. fungi