‘Teenage’ carnivores wiped out mid-sized dinosaurs — study

The video discusses the size distribution of meat-eating dinosaurs, highlighting the lack of medium-sized species. It explains that the presence of giant carnivorous dinosaurs led to the extinction of midsize species due to competition from younger, smaller dinosaurs forming hunting packs. The study, published in the journal Science, analyzed 550 dinosaur species worldwide, revealing that dinosaur species are less diverse compared to other fossils.

What was a notable characteristic of meat-eating dinosaurs in terms of size?

• They were mostly small.

• They were mostly medium-sized.

• They were either small or very large.

• They were all the same size.

According to the study, what was a reason for the lack of diversity among dinosaur species?

• They evolved at the same time.

• They had similar diets.

• They all lived in the same region.

• There were more large species than small ones.

What did the study published in Science focus on?

• The sizes of around 550 dinosaur species.

• The habitats of dinosaurs.

• The diet of dinosaurs.

• The extinction of dinosaurs.

What happened when giant carnivorous dinosaurs were present in a region?

• All dinosaurs became smaller.

• A gap between small and big species appeared.

• Dinosaurs stopped evolving.

• All dinosaurs became herbivores.

How did smaller young dinosaurs impact midsize species?

• They ignored midsize species.

• They formed alliances with midsize species.

• They formed hunting packs that outcompeted midsize species.

• They helped midsize species survive.