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Life began on earth 3 billion yrs ago according to the theory of evolution..

Species evolve by natural selection. ie birds with sharp beaks will thrive on an island where nuts are prolific, whereas animals unable to crack the nuts would die off..

Test Bite

You scored 8 out of 8

1. Which kingdom has organisms with cell walls and chlorophyll?

You said: Plantae

Correct (http://www.bbc.co.uk/schools/ks3bitesize/images/f/shared/tick.gif) Correct.

2. How would organisms in the kingdom protoctista be described?

You said: Usually unicellular with a nucleus

Correct (http://www.bbc.co.uk/schools/ks3bitesize/images/f/shared/tick.gif) Correct.

3. Which class would an organism belong to if it has lungs, uses internal fertilisation and gives birth to live young?

You said: Mammal

Correct (http://www.bbc.co.uk/schools/ks3bitesize/images/f/shared/tick.gif) Correct.

4. How many "kingdoms" are there?

You said: Five

Correct (http://www.bbc.co.uk/schools/ks3bitesize/images/f/shared/tick.gif) Correct.

5. What does oviparous mean?

You said: Lays eggs

Correct (http://www.bbc.co.uk/schools/ks3bitesize/images/f/shared/tick.gif) Correct.

6. What is the correct order for classification?

You said: Kingdom, phylum, class, order, family, genus, species

Correct (http://www.bbc.co.uk/schools/ks3bitesize/images/f/shared/tick.gif) Correct.

7. What is the correct name for modern man?

You said: Homo sapien

Correct (http://www.bbc.co.uk/schools/ks3bitesize/images/f/shared/tick.gif) Correct.

8. What is the feature of a poikilotherm?

You said: Temperature varies with surroundings

Correct (http://www.bbc.co.uk/schools/ks3bitesize/images/f/shared/tick.gif) Correct.

Classification - Higher tier

Test Bite

You scored 8 out of 8

1. What is a hybrid?

You said: Offspring of closely related species that are infertile

Correct (http://www.bbc.co.uk/schools/ks3bitesize/images/f/shared/tick.gif) Correct.

2. What is the Larus part of the name Larus fuscus?

You said: Genus

Correct (http://www.bbc.co.uk/schools/ks3bitesize/images/f/shared/tick.gif) Correct.

3. What is a ring species?

You said: Chain of closely related species but some can't interbreed

Correct (http://www.bbc.co.uk/schools/ks3bitesize/images/f/shared/tick.gif) Correct.

4. What is the advantage of a binomial naming system?

You said: Allows scientists to communicate across the world

Correct (http://www.bbc.co.uk/schools/ks3bitesize/images/f/shared/tick.gif) Correct.

5. Why is the hybridisation of ducks a classification problem?

You said: They have a continuous range of characteristics

Correct (http://www.bbc.co.uk/schools/ks3bitesize/images/f/shared/tick.gif) Correct.

6. In the binomial naming system, which is the correct order?

You said: Genus species

Correct (http://www.bbc.co.uk/schools/ks3bitesize/images/f/shared/tick.gif) Correct.

7. Which name represents the UK robin?

You said: Erithacus rubecula

Correct (http://www.bbc.co.uk/schools/ks3bitesize/images/f/shared/tick.gif) Correct.

8. What is meant by the term 'species'?

You said: Organisms that can interbreed to produce fertile offspring

Correct (http://www.bbc.co.uk/schools/ks3bitesize/images/f/shared/tick.gif) Correct.

Variation

Test Bite

You scored 6 out of 6

1. What does survival of the fittest mean?

You said: The best adapted species is most likely to survive

Correct (http://www.bbc.co.uk/schools/ks3bitesize/images/f/shared/tick.gif) Correct.

2. Which of the following is an example of continuous variation?

You said: Height

Correct (http://www.bbc.co.uk/schools/ks3bitesize/images/f/shared/tick.gif) Correct.

3. What is likely to happen to an individual that is poorly suited to its environment?

You said: It will not survive to reproduce

Correct (http://www.bbc.co.uk/schools/ks3bitesize/images/f/shared/tick.gif) Correct.

4. How is the polar bear adapted to survive the cold temperatures?

You said: Thick layers of fat and fur for insulation

Correct (http://www.bbc.co.uk/schools/ks3bitesize/images/f/shared/tick.gif) Correct.

5. How does the Pompeii worm survive the high temperatures of the hydrothermal vent?

You said: Utilises a thick layer of bacteria

Correct (http://www.bbc.co.uk/schools/ks3bitesize/images/f/shared/tick.gif) Correct.

6. What is discontinuous variation often caused by?

You said: Inherited variation

Correct (http://www.bbc.co.uk/schools/ks3bitesize/images/f/shared/tick.gif) Correct.

Evolution

Test Bite

You scored 7 out of 7

1. What was the name of the book published by Charles Darwin?

You said: On the Origin of

Comments

Former Member


thanks. the receptor topics really helped!!!

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