The enzyme that breaks down starch into sugar in the mouth is: MCQ with Answer and Explanation

Explanation:
Sympathetic (fight or flight) and parasympathetic (rest and digest) are divisions of the autonomic nervous system, not somatic. Thus, 3 is incorrect.

Explanation:
The stem is characterized by the presence of nodes, which are the junctions where leaves and buds arise, and internodes, the segments between two nodes. While some stems are modified to grow underground (like potatoes or onions) for storage or perennation, the primary and most common form of the stem is aerial, growing above the ground. Statements 1 and 2 are correct.

Explanation:
In cymose (definite) inflorescence, the main axis ends in a flower, limiting further growth, and lateral branches develop below it, which also end in flowers. Racemose is indeterminate with apical growth continuing. Spike and umbel are types of racemose. Cymose includes cymes.