Why would a lack of neurotransmitters change the function of the brain?
A. Signals travel from neuron to neuron through neurotransmitters.
B. Neurons in the spinal cord are made of neurotransmitters.
C. Neurotransmitters connect the axon to the nucleus.
D. Neurotransmitters are the only chemicals that can enter the myelin
sheath.

When analyzing tree rings, what do scientists assume a thin ring indicates?

Which of the following would most directly interfere with sperm production? ingestion of a substance that mimicked inhibin interruption of sustentocytes' production of abp low sperm count use of synthetic steroids (testosterone)

Answer asap 50 points which of the following distinguishes the soil composition of grassland? 1. the soil supports large trees with thick, long roots, so horizon b needs to be deep enough to sustain larger flora. 2. the soil supports large trees with thick, long roots, so horizon a needs to be deep enough to sustain larger flora. 3. the soil supports small plants and shrubs with short roots, so horizon a needs to be deep enough to sustain smaller flora. 4. the soil supports small plants and shrubs with short roots, so horizon b needs to be deep enough to sustain smaller flora.