Answer:
d. ligand-gated ion channel
Explanation:
When a neurotransmitter released from the pre-synaptic neuron binds to a ligand-gated ion channel on the post-synaptic neuron, that neuron depolarizes and fires.
Answer:
Rhizobium is a genus of bacteria associated with the formation of root nodules on plants. These bacteria live in symbiosis with legumes.
Explanation:
The answer is semicircular canals. The part of the ear responsible for hearing and balance is the inner ear. The inner ear is composed of three parts: the cochlea's role is for hearing, the semicircular canal is for balance and the last, the vestibule connects the two parts to other structures in the ear.
Answer:
d. Nucleus, mitochondria, chloroplast
