Leaf: alternate, entire to irregularly serrate or dentate, proximal tapered at base; teeth generally bristle-tipped.
Many of the "bridging" and "advanced" courses listed above (items c and d) are offered only in alternate years or irregularly, and many have one or more prerequisites that are not required for the biology major or this concentration.
This led Messiaen to use rhythmic cells that irregularly alternate between two and three units, a process which also occurs in Stravinsky's The Rite of Spring, which Messiaen admired.
There is a theory, however, that the basic rhythmic units had the same durational value and were grouped in irregularly alternating groups of twos and threes.
Rising high against the 40 120 m of undulating terrain of the coast of emergence, the 900- to 2695-m high Sahyadri is remarkable for its spectacular western flank that is characterized by high escarpments alternating with narrow, irregularly tilted terraces forming a 'landing stair' (ghat) geomorphic architecture known as the Western Ghat.
"... Intriguingly, the amplitude of ongoing oscillations, such as measured in EEG recordings, fluctuates irregularly, with episodes of high amplitude (HAE) alternating with episodes of low amplitude (LAE).
Leaf: simple, opposite (or distal alternate), sessile or petioled; blades linear [triangular], entire to dentate or irregularly lobed.
The anions and cations form alternating layered alignments, and the anionic layer is built by the irregularly heteroleptic [Ni dmit)(mnt)]− chains, where the neighboring anions are connected via lateral-to-lateral S…S contacts of dmit2− ligands.
On an irregularly shaped structure, there may be more than four hips, which then may alternate with valleys to form a hip-and-valley roof.
