A(n) channel opens when a neurotransmitter binds to a protein. A. graded potential
B. voltage-gated
C. chemically gated
D. electrical synapse

What does all of the organ system in a human form

Biology 1c cumulative exam i need awsners

In which terrestrial biome can you find trees that produce cones instead of flowers and needles instead of leaves? have trees that produce cones instead of flowers and needles instead of leaves. the latitudes in this biome have evenly distributed precipitation throughout the year. is it high or low