Test
AQA GCSE Biology Unit 2.6
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Preguntas del test (20)
1How many years ago do most scientists believe life on Earth began?
- A3 thousand (3 * 10^3)
- B3 million (3 * 10^6)
- C3 billion (3 * 10^9)
2Which of these are methods of fossilisation?
- AAnoxic or hypoxic conditions in animal decay
- BPresence of bacteria in animal decay
- CPreservation of the bones, teeth, shells or claws of an animal
- DPreservation of rootlets, burrows, footprints and droppings
- EHaving an animal die between two rocks
- FPreservation in ice preventing decay
- GAnimals dying due to disasters such as volcanoes
- HMineralisation of body parts
3True or false? The skeletons of animals must be covered in sediment before they can be fossilised.
- AVerdadero
- BFalso
4True or false? Mineralisation (turning of the skeleton to rock) occurs in the presence of oxygen and over a short period of time.
- AVerdadero
- BFalso
5Which of these are reasons why the fossil record is incomplete?
- ANineteenth-century scientists didn't realise the value of fossils so they were discarded during geological experiments
- BMost early organisms had soft bodies which didn't fossilise well
- CAnimals decayed more easily due to higher numbers of bacteria, leading to fewer fossilisations
- DGeological activity such as erosion and melting of rock has destroyed many fossils
6True or false? The shark's fossils look very similar to the modern animal due to its adaptations being perfect for its environment.
- AVerdadero
- BFalso
7The 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?
- AThat Hyracotherium was better adapted to eating insects than grass
- BThat Hyracotherium was better adapted to walking on soft ground, rather than running on hard ground
- CThat Hyracotherium died out with the dinosaurs 65mya
8What is extinction?
- AThe forcible removal of an animal from its natural habitat
- BA cull enforced by a government, such as the British badger cull
- CThe permanent loss of all members from a species
9What type of extinction-causing organism is the grey squirrel in the UK?
- AA new predator
- BA new disease
- CA new competitor
10True or false? Hedgehogs were introduced to North Uist to remove garden slugs, but are eating the chicks of rare sea birds instead.
- AVerdadero
- BFalso
11When, according to scientists, was the last Ice Age on Earth?
- A10,000 years ago
- B100,000 years ago
- C1,000,000 years ago
12True or false? Mammals survived the dinosaur extinction as they could control their own body temperature.
- AVerdadero
- BFalso
13Which of these years saw mass extinctions? (mya = millions of years ago)
- A65mya
- B150mya
- C205mya
- D251mya
- E3mya
14True or false? There are no alternative theories to the extinction of the dinosaurs.
- AVerdadero
- BFalso
15True 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.
- AVerdadero
- BFalso
16Which of these are types of environmental isolation?
- AFormation of a new mountain range
- BBuilding a canal splitting two fields in half
- COne area of grassland becoming warmer than others
- DIntroducing trees with wider canopies into one area of forest
17Which stage follows isolation in the process of speciation?
- ANatural selection
- BInability to interbreed
- CMutation
- DEvolution
18Which organisms are most likely to breed?
- AThose with favourable alleles for the environment
- BThose with hindering alleles for the environment
- CThose with neutral alleles for the environment
19True or false? The defining feature of a species is that it can interbreed with no other.
- AVerdadero
- BFalso
20What is meant by the term endemic?
- ARelating to organisms that live in only one area
- BA disease concentrated in one area
- CRelating to organisms that live on peninsulas
Información
- Descripción
- Twenty questions for the sixth section of Unit 2 in AQA GCSE Biology: Old and new species.
- Autor
- Matthew T
- Idioma
- English
- Visitas
- 391
- Etiquetas
- Valoración
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