biology

Leonid Portenko

Leonid Portenko is a biology 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 Leonid Portenko rather than just read about it. In short: Leonid Oleksandrovych Portenko (Ukrainian: Леонід Олександрович Портенко; 11 October 1896 – 26 May 1972) was a Soviet ornithologist of Ukrainian origin who carried out extensive zoogeographic studies on the birds of the northern and north-eastern Palearctic realm. He was born in Smila, though most of his career was spent working in, and conducting expeditions from, the ornithological department of the Zoological Ins…

Key takeaways

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

Reference excerpt

Leonid Oleksandrovych Portenko (Ukrainian: Леонід Олександрович Портенко; 11 October 1896 – 26 May 1972) was a Soviet ornithologist of Ukrainian origin who carried out extensive zoogeographic studies on the birds of the northern and north-eastern Palearctic realm. He was born in Smila, though most of his career was spent working in, and conducting expeditions from, the ornithological department of the Zoological Institute of the Academy of Sciences of the Soviet Union in Leningrad. His publications include:

1939, 1941 – Fauna of the Anadyr area 1954, 1960 – The birds of the USSR 1972–1973 – The birds of the Chukchi Peninsula and Wrangel Island 1973 – Fauna of birds of non-polar parts of the Northern Urals 1975 – The birds of zonal steppes and deserts of Central Asia

References

Further reading Palmer R.S. 1973. Leonid Oleksandrovych Portenko. Auk 90: 487.

Illustrations

Worked examples

Example 1 — a first encounter with Leonid Portenko

Start with the simplest possible case. Write down what Leonid Portenko claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, 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 Leonid Portenko 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 Leonid Portenko 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 Leonid Portenko

In research: Leonid Portenko appears in biology 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 Leonid Portenko 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: Leonid Portenko is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1896 births, 1972 deaths, 20th-century Ukrainian zoologists, so understanding it makes those chapters shorter.
In everyday life: Look for Leonid Portenko 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 Leonid Portenko in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Leonid Portenko 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 Leonid Portenko out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Leonid Portenko in simple terms?

Why does Leonid Portenko matter?

Because it connects several biology 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 Leonid Portenko?

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 Leonid Portenko.