AQA GCSE Biology Unit 2.6

1

How many years ago do most scientists believe life on Earth began?

1

Which of these are methods of fossilisation?

1

True or false? The skeletons of animals must be covered in sediment before they can be fossilised.

1

True or false? Mineralisation (turning of the skeleton to rock) occurs in the presence of oxygen and over a short period of time.

1

Which of these are reasons why the fossil record is incomplete?

1

True or false? The shark's fossils look very similar to the modern animal due to its adaptations being perfect for its environment.

1

The earliest ancestor of the modern horse, Equus, is believed to be Hyracotherium. Equus has only one toe in its forefeet, but Hyracotherium has four. What can we learn from this fossil evidence?

1

What is extinction?

1

What type of extinction-causing organism is the grey squirrel in the UK?

1

True or false? Hedgehogs were introduced to North Uist to remove garden slugs, but are eating the chicks of rare sea birds instead.

1

When, according to scientists, was the last Ice Age on Earth?

1

True or false? Mammals survived the dinosaur extinction as they could control their own body temperature.

1

Which of these years saw mass extinctions? (mya = millions of years ago)

1

True or false? There are no alternative theories to the extinction of the dinosaurs.

1

True or false? Scientists have discovered that the crater in Chicxulub was caused by an asteroid 65mya due to bands of iridium running around the crater.

1

Which of these are types of environmental isolation?

1

Which stage follows isolation in the process of speciation?

1

Which organisms are most likely to breed?

1

Twenty questions for the sixth section of Unit 2 in AQA GCSE Biology: Old and new species.

AQA GCSE Biology Unit 2.6

How many years ago do most scientists believe life on Earth began?

Which of these are methods of fossilisation?

True or false? The skeletons of animals must be covered in sediment before they can be fossilised.

True or false? Mineralisation (turning of the skeleton to rock) occurs in the presence of oxygen and over a short period of time.

Which of these are reasons why the fossil record is incomplete?

True or false? The shark's fossils look very similar to the modern animal due to its adaptations being perfect for its environment.

The earliest ancestor of the modern horse, Equus, is believed to be Hyracotherium. Equus has only one toe in its forefeet, but Hyracotherium has four. What can we learn from this fossil evidence?

What is extinction?

What type of extinction-causing organism is the grey squirrel in the UK?

True or false? Hedgehogs were introduced to North Uist to remove garden slugs, but are eating the chicks of rare sea birds instead.

When, according to scientists, was the last Ice Age on Earth?

True or false? Mammals survived the dinosaur extinction as they could control their own body temperature.

Which of these years saw mass extinctions? (mya = millions of years ago)

True or false? There are no alternative theories to the extinction of the dinosaurs.

True or false? Scientists have discovered that the crater in Chicxulub was caused by an asteroid 65mya due to bands of iridium running around the crater.

Which of these are types of environmental isolation?

Which stage follows isolation in the process of speciation?

Which organisms are most likely to breed?

True or false? The defining feature of a species is that it can interbreed with no other.

What is meant by the term endemic?