Taking a bite out of shark feeding patterns! NSF Science Now 46

The video covers three NSF-funded research projects. The first explores how different shark species use their teeth for feeding, revealing a trade-off between sharpness and longevity. The second project uses crowdsourcing to improve the quality of test questions, offering a faster and cheaper alternative to traditional methods. The final project introduces a computer program that enhances the accuracy of detecting recurring brain cancer in MRI scans, outperforming human neuroradiologists.

What did researchers discover about the teeth of tiger sharks compared to blunt nose 6 gill sharks?

• Tiger sharks' teeth dull quickly and need frequent replacement.

• Blunt nose 6 gill sharks have sharper teeth.

• Blunt nose 6 gill sharks bite their prey into pieces.

• Tiger sharks have teeth that last longer.

What is the trade-off in shark teeth characteristics discovered by researchers?

• Between the speed of hunting and the size of prey.

• Between size and color of the teeth.

• Between the number of teeth and their sharpness.

• Between sharpness and longevity of the tooth edge.

How does crowdsourcing help in developing test questions?

• It limits the number of questions that can be tested.

• It replaces the need for any testing.

• It speeds up the process of evaluating question quality.

• It allows for more expensive testing.

What role do crowdsourcing websites play in the study conducted by Harvard University researchers?

• They limit the number of participants in a study.

• They replace the need for any human involvement.

• They assign tasks to a global community for small payments.

• They provide a platform for expensive testing.

What was the main advantage of the computer program developed for cancer detection?

• It could diagnose all types of cancer.

• It was more accurate than neuroradiologists in identifying cancerous tissue.

• It was cheaper than traditional methods.

• It was less accurate than neuroradiologists.