Dinosaurs & Prehistoric Life · Unit 18
Frontiers of Palaeontology
Molecules, isotopes, scanning, colour and the open questions
The techniques in this unit did not exist a generation ago, and several answer questions that were considered permanently unanswerable.
It covers recovering colour from fossil melanosomes, molecular palaeontology, isotope chemistry, CT scanning and digital fossils, and the ethical questions around fossil collecting and the commercial market.
This unit breaks down into 18 short steps and 108 questions, starting at difficulty 4 and building to 5. Below you can see exactly what it covers, how the path is structured, and worked examples with explanations.
- Steps
- 18
- Questions
- 108
- Difficulty
- 4-5
What this unit covers
- Recovering Colour
- Molecular Palaeontology
- Open Questions and Ethics
- Scanning and Digital Fossils
- Isotopes and Chemistry
Where this fits
The final unit. Assumes How Palaeontology Works and Dinosaur Biology.
Where people slip
Recovering dinosaur DNA is not on the table. DNA degrades far too fast, and molecular palaeontology works on far more durable molecules like collagen fragments.
How the unit is structured
Frontiers of Palaeontology runs as 18 short steps that unlock in order. 13 are practice rounds and 5 are challenge rounds that pull together everything before them. Questions start at difficulty 4 and climb to 5 as you progress.
Challenge rounds
Example questions
30 real questions from this unit, with the answer and the reason behind it, grouped by what they practise. There are 108 in the unit altogether.
Isotopes and Chemistry
- Choose all that applyLevel 4
1. Which questions can isotopes address? Pick all that apply.
- Dietcorrect
- Body or environmental temperaturecorrect
- Migration and provenancecorrect
- Exact species identity
Diet, temperature, water source and movement are all accessible.
- Multiple choiceLevel 4
2. What do carbon isotopes indicate about diet?
- Which kinds of plants were in the food chaincorrect
- How fast the animal ate
- The animal's weight
- Its age in days
Different plant types have distinct carbon signatures that pass into consumers.
- True or falseLevel 4
3. Strontium isotopes can indicate where an animal lived or travelled.
Answer: True
True. Local geology gives distinctive strontium ratios that enter the food chain.
- Type the answerLevel 4
4. Which isotope system is used to track animal movement between geological regions?
Answer: strontium
Strontium isotope ratios reflect the underlying bedrock.
- Multiple choiceLevel 4
5. What did strontium work on sauropod teeth suggest?
- That some sauropods migrated seasonallycorrect
- That they never moved
- That they lived underwater
- That they ate only meat
That some sauropods travelled long distances seasonally, possibly following water and food.
- Choose all that applyLevel 5
6. Which isotope systems appear in palaeontology? Pick all that apply.
- Oxygencorrect
- Carboncorrect
- Strontiumcorrect
- Helium in bone
Oxygen, carbon, strontium and calcium isotopes are all used.
Molecular Palaeontology
- Choose all that applyLevel 4
7. Which molecules have been reported from ancient specimens? Pick all that apply.
- Melanincorrect
- Collagen peptidescorrect
- Lipid residuescorrect
- Intact dinosaur genomes
Melanin, collagen peptides and lipids have all been reported, with varying confidence.
- Fill the blankLevel 4
8. The idea of extracting dinosaur DNA from ____ has been shown not to work.
- ambercorrect
- chalk
- granite
- ice
Claims of DNA from insects in amber failed to replicate.
- Multiple choiceLevel 4
9. How can contamination be tested for in molecular studies?
- With blanks, replication and checks against modern contaminants
- By working faster
- By using bigger samples only
- It cannot be tested
By running blanks, using independent laboratories and checking whether sequences match modern species.
- True or falseLevel 4
10. No usable dinosaur DNA has ever been recovered.
Answer: True
True. DNA degrades far too quickly to survive sixty-six million years.
- Type the answerLevel 4
11. Which structural protein of bone and skin has been reported in some dinosaur fossils?
Answer: collagen
Collagen peptides have been reported, though the claims remain debated.
- Choose all that applyLevel 4
12. Which criteria strengthen a molecular palaeontology claim? Pick all that apply.
- Replication in another laboratorycorrect
- Rigorous contamination controlscorrect
- Agreement between different methodscorrect
- A single spectacular image
Independent replication, contamination controls and multiple methods all matter.
Open Questions and Ethics
- Build the sentenceLevel 4
13. Build a sentence about the science of the future.
Answer: New methods open new questions
New methods keep opening new questions about old bones.
- Choose all that applyLevel 4
14. Which are current priorities in the field? Pick all that apply.
- Ethical and legal collectingcorrect
- Open sharing of datacorrect
- Broadening who takes partcorrect
- Keeping discoveries secret
Ethical collecting, open data and broader participation are all major concerns.
- Multiple choiceLevel 4
15. Which question about dinosaurs remains genuinely unresolved?
- Exactly how their metabolism worked across the groupcorrect
- Whether birds are dinosaurs
- Whether they laid eggs
- Whether they lived on land
The details of their metabolism and how it varied across the group are still debated.
- True or falseLevel 4
16. Climate change is exposing new fossils in some regions while destroying others.
Answer: True
True. Thawing permafrost and coastal erosion both expose and threaten material.
- Fact or fibLevel 5
17. Some of the biggest questions about dinosaurs remain genuinely open.
Answer: True
True, which is exactly why the science is still active.
- Put in orderLevel 5
18. Put these stages of a modern palaeontological study in order.
Answer: Frame a clear question -> Collect and document evidence -> Analyse with stated methods -> Submit for peer review -> Share data openly
Question, evidence, analysis, peer review, then open sharing.
Recovering Colour
- Choose all that applyLevel 4
19. Which colours have been inferred for feathered dinosaurs? Pick all that apply.
- Blackcorrect
- Reddish-browncorrect
- Iridescent sheencorrect
- Fluorescent pink
Black, reddish-brown and iridescent sheens have all been proposed.
- Multiple choiceLevel 4
20. How have scientists estimated the colour of some feathered dinosaurs?
- By matching melanosome shapes with modern birdscorrect
- By finding preserved pigment paint
- By reading ancient records
- By guessing from body size
By comparing preserved melanosome shapes with those producing known colours in living birds.
- True or falseLevel 4
21. Sinosauropteryx is reconstructed with a striped tail and a bandit-like face mask.
Answer: True
True, based on the distribution of preserved pigment structures.
- Type the answerLevel 4
22. What are the tiny pigment-bearing structures used to infer fossil colour called?
Answer: melanosomes
Melanosomes hold melanin pigment.
- Multiple choiceLevel 4
23. Which small feathered dinosaur had its full colour pattern reconstructed in 2010?
- Anchiorniscorrect
- Triceratops
- Diplodocus
- Ankylosaurus
Anchiornis was reconstructed with black and white wings and a reddish crest.
- Choose all that applyLevel 5
24. Which caveats apply to fossil colour work? Pick all that apply.
- Melanosome alteration during fossilisationcorrect
- Bacteria that resemble melanosomescorrect
- Only part of the body being sampledcorrect
- Colour being impossible in nature
Preservation change, microbial mimicry and incomplete sampling all limit conclusions.
Scanning and Digital Fossils
- Choose all that applyLevel 4
25. Which imaging methods are used on fossils? Pick all that apply.
- Micro-CT scanningcorrect
- Synchrotron tomographycorrect
- Surface laser scanningcorrect
- Ultrasound of living dinosaurs
CT, synchrotron, neutron imaging and surface scanning all have roles.
- Multiple choiceLevel 4
26. What does micro-CT scanning provide?
- Detailed 3D images of internal structurecorrect
- Chemical composition only
- The specimen's age
- Its original colour
High-resolution three-dimensional images of internal structures without cutting the specimen.
- True or falseLevel 4
27. Digital models allow specimens to be studied by researchers anywhere in the world.
Answer: True
True, provided the data are shared openly.
- Type the answerLevel 4
28. What technique builds 3D models from many overlapping photographs?
Answer: photogrammetry
Photogrammetry is cheap, portable and widely used.
- Choose all that applyLevel 4
29. Which uses do digital fossil models support? Pick all that apply.
- Precise measurementcorrect
- Sharing with other researcherscorrect
- Biomechanical simulationcorrect
- Extracting ancient proteins
Measurement, sharing, simulation and public exhibition all benefit.
- Multiple choiceLevel 4
30. What advantage does synchrotron imaging offer?
- Very high resolution and material contrastcorrect
- It works without equipment
- It removes rock physically
- It provides DNA
Extremely bright X-rays reveal minute details and subtle differences in material.
Where these questions come from. Each unit starts as a plan of the concepts it should cover and the difficulty it should span. Questions are written against that plan with AI assistance, then checked by a validator that rejects anything without a single defensible answer, an explanation, or plausible wrong options. How we write questions sets out the whole process, and corrections are fixed in the bank and reach the site and the app the same day.
How you practise
This unit mixes 8 different question formats, so you are recalling and applying rather than recognising the same layout every time.
- Build the sentence
- Choose all that apply
- Fact or fib
- Fill the blank
- Multiple choice
- Put in order
- True or false
- Type the answer
Practise Frontiers of Palaeontology
108 questions across 18 steps. Start with step one and crawl at your own pace.
Play this unitRead about Frontiers of Palaeontology
Explainers from our blog on what this unit covers. Each one ends with real questions from the bank.
More units in Dinosaurs & Prehistoric Life
- What Is a Dinosaur?What dinosaurs were, when they lived and how we name them
- Famous DinosaursTyrannosaurus, Triceratops, Stegosaurus and the other stars
- Meat Eaters and Plant EatersTeeth, claws, defences and what dinosaurs ate
- Fossils and Fossil HuntingWhat fossils are, how they form and how they are found
- The Age of DinosaursTriassic, Jurassic and Cretaceous, and how deep time works
- Eggs, Nests and Growing UpDinosaur eggs, nests, babies and family life
- Flying and Swimming ReptilesPterosaurs, plesiosaurs and the sea monsters that were not dinosaurs
- The Great ExtinctionThe asteroid, the volcanoes and who survived