astronomy

Mark Alan Hershkovitz

Mark Alan Hershkovitz is a astronomy topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Mark Alan Hershkovitz rather than just read about it. In short: Mark Alan Hershkovitz is an American biochemist and taxonomist. The standard author abbreviation Hershk. is used to indicate this person as the author when citing a botanical name.

Key takeaways

Mark Alan Hershkovitz belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Mark Alan Hershkovitz to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Mark Alan Hershkovitz from memory before moving on to harder problems.

Reference excerpt

Mark Alan Hershkovitz is an American biochemist and taxonomist. The standard author abbreviation Hershk. is used to indicate this person as the author when citing a botanical name. In 1981 he received his Bachelor of Science from University of Illinois, Urbana-Champaign. He received his Master of Science and PhD degrees from University of California, Davis, in 1986 and 1990; his focus in his doctoral program was botany. Afterwards, he worked for the Laboratory of Molecular Systematics at the Smithsonian Institution as a postdoctoral scientist, and c. 1996 he joined the National Center for Biotechnology Information as a fellow under the Postdoctoral Intramural Research Training Award. As of 2025 he is doing independent research in Chile.

Taxa (re)named by Hershkovitz Cistanthe amaranthoides (Phil.) Carolin ex Hershk. C. arenaria (Cham.) Carolin ex Hershk. C. calycina Carolin ex Hershk. C.celosioides (Phil.) Carolin ex Hershk. C.cephalophora (I.M.Johnston) Carolin ex Hershk. C.coquimbensis (Barneoud) Carolin ex Hershk. C.cymosa (Phil.) Hershk. C. densiflora (Barnéoud) Hershk. C. monandra (Nutt.) Hershk.

Works Hershkovitz, M.A. & Zimmer, E.A. 2000. Ribosomal DNA evidence and disjunctions of western American Portulacaceae Mol. Phylogenetics and Evolution 15(3): 419–439. Hershkovitz M.A., Arroyo M.T.K, Bell C., and Hinojosa L.F 2006 Phylogeny of Chaetanthera (Asteraceae: Mutisieae) reveals both ancient and recent origins of the high elevation lineages Archived 2019-05-05 at the Wayback Machine Molecular Phylogenetics and Evolution 41: 594-605.

Hershkovitz, M. A. (April–June 1992). "Leaf Morphology and Taxonomic Analysis of Cistanthe tweedyi (Nee Lewisia tweedyi; Portulacaceae)". Systematic Botany. 17 (2): 220–238. Bibcode:1992SysBo..17..220H. doi:10.2307/2419519. JSTOR 2419519. Hershkovitz, M. A. (November 1989). "Phylogenetic Studies in Centrospermae: A Brief Appraisal". Taxon. 38 (4). Wiley: 602–608. Bibcode:1989Taxon..38..602H. doi:10.2307/1222636. JSTOR 1222636.

References

Worked examples

Example 1 — a first encounter with Mark Alan Hershkovitz

Start with the simplest possible case. Write down what Mark Alan Hershkovitz claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In astronomy, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Mark Alan Hershkovitz before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Mark Alan Hershkovitz ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Mark Alan Hershkovitz

In research: Mark Alan Hershkovitz appears in astronomy research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Mark Alan Hershkovitz in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Mark Alan Hershkovitz is common in secondary-school and first-year university syllabi. It links to neighbouring topics 20th-century American biochemists, 21st-century American biochemists, Academic staff of the University of Chile, so understanding it makes those chapters shorter.
In everyday life: Look for Mark Alan Hershkovitz outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Mark Alan Hershkovitz in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Mark Alan Hershkovitz means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Mark Alan Hershkovitz out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Mark Alan Hershkovitz in simple terms?

Mark Alan Hershkovitz is an American biochemist and taxonomist. The standard author abbreviation Hershk. is used to indicate this person as the author when citing a botanical name.

Why does Mark Alan Hershkovitz matter?

Because it connects several astronomy ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Mark Alan Hershkovitz?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Mark Alan Hershkovitz.