Consider statements about evolution: 1. The beak of Darwin's finches is an example of adaptive radiation. 2. Industrial melanism is an example of natural selection. 3. Homologous organs indicate convergent evolution. Which are correct? MCQ with Answer and Explanation

Explanation:
Acetylcholinesterase degrades acetylcholine into acetate and choline, terminating the synaptic signal. Choline acetyltransferase synthesizes ACh, MAO and COMT degrade monoamines.

Explanation:
The stomach's gastric glands secrete hydrochloric acid (HCl), which creates an acidic medium necessary for the activation of pepsin and kills ingested microbes. The small intestine, with its vast surface area provided by villi and microvilli, is the primary site for the digestion and absorption of most nutrients into the bloodstream. The large intestine primarily absorbs water, electrolytes, and some vitamins produced by gut bacteria, but not the majority of nutrients. Thus, statements 1 and 2 are correct.

Explanation:
A synapse is the junction between two neurons (or neuron and effector) where the nerve impulse is transmitted from the presynaptic neuron to the postsynaptic neuron, usually via neurotransmitters. Axon carries impulses away from the cell body, dendrites receive signals, soma is the cell body. Synaptic transmission can be chemical or electrical.