biology

Obruchevichthys

Obruchevichthys 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 Obruchevichthys rather than just read about it. In short: Obruchevichthys is an extinct genus of stem-tetrapod from Latvia during the Late Devonian. When the jawbone, the only known fossil of this creature, was uncovered in Latvia, it was mistaken as a lobe-fin fish.

Key takeaways

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

Reference excerpt

Obruchevichthys is an extinct genus of stem-tetrapod from Latvia during the Late Devonian. When the jawbone, the only known fossil of this creature, was uncovered in Latvia, it was mistaken as a lobe-fin fish. However, when it was analyzed, it proved to hold many similarities to Elginerpeton, from Scotland. It was then declared belonging to the earliest group of tetrapods.

References

External links Devonian Times article on Obruchevichthys gracilis Archived 9 May 2008 at the Wayback Machine Obruchevichthys gracilis and Elginerpeton at Palaeos.com

Further reading Gaining Ground: The Origin and Early Evolution of Tetrapods by Jennifer A. Clack Origins of the Higher Groups of Tetrapods: Controversy and Consensus by Hans-Peter Schultze and Linda Trueb Air-Breathing Fishes: Evolution, Diversity, and Adaptation by Jeffrey B. Graham

Worked examples

Example 1 — a first encounter with Obruchevichthys

Start with the simplest possible case. Write down what Obruchevichthys 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 Obruchevichthys 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 Obruchevichthys 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 Obruchevichthys

In research: Obruchevichthys 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 Obruchevichthys 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: Obruchevichthys is common in secondary-school and first-year university syllabi. It links to neighbouring topics Devonian sarcopterygians of Europe, Fauna of Latvia, Fossil taxa described in 1977, so understanding it makes those chapters shorter.
In everyday life: Look for Obruchevichthys 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 Obruchevichthys in 20 minutes

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

Frequently asked questions

What is Obruchevichthys in simple terms?

Why does Obruchevichthys 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 Obruchevichthys?

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 Obruchevichthys.