1. B1 Core revision Session 1
We are going to concentrate on the key knowledge needed for the exam

2. We need to practice answering to a time limit
You have 4min to answer Q1 this will be shown
by a red circle appearing below

3. Answers to Q1 Kingdom Characteristics Animalia
multicellular, no cell walls, no chlorophyll, feed heterotrophically
Plantae
multicellular, have cell walls, have chlorophyll, feed autotrophically
Fungi
multicellular, have cell walls, no chlorophyll, feed saprophytically
Protoctista
unicellular, have a nucleus
Prokaryota
unicellular, have no nucleus

4. The next 3 questions will take 3min
Why are viruses not classified in a kingdom?
What does Chordata mean?
What are vertebrates?

5. Q2 VIRUSES are classified as NON LIVING because…
The virus does not show the characteristics of life such as growth and feeding (1)
They need a host to reproduce

6. Spinal cord will be marked wrong It is also the PHYLUMQ3
A Rod shaped Backbone
Spinal cord will be marked wrong
It is also the PHYLUM

7. Animals with backbonesQ4
Animals with backbones

8. 1min
Why would a scientist classify an animal as a vertebrate?

9. If it had a backbone

10. What reasons could cause an animal to become extinct?
It says reasons so more than one
Timer is 2 mins

11. You get lots of these types of questions.
Cave Bears have the bimominal name Ursus spelaeus, which is the genus and which is the species?
This fungi is Russula silvicola, which is the genus and which is the species?
The binominal name for tigers is Panthera tigris, which is the genus and which is the species?

12. Evolution
What are the stages of evolution?

13. V O C A B Variation – individuals in a species differ
Overproduction – more offspring than survive to be adults
Competition
Advantageous characteristic – they survive
Breeding – those with AC will reproduce

14. What does geographic isolation mean?
When animals are separated from the rest of their group, usually by accident so they can’t all interbreed anymore.
E.g an earthquake
The two groups will evolve different advantageous characteristics to survive

15. Why might an animal become extinct?
Predators killing them
Disease
Change in environmental conditions e.g snow
Loss of food source
Increased competition
Limited adaptations
Unable to rproduce

16. Nervous system What are the three type of neurone? What is a stimulus?
What is an effector?
3 minutes

17. Answers Sensory, motor, relay A change in environment
The organ that carries out the response e.g the muscle that moves

18. How does information travel along a sensory neurone?
2 minutes

19. Answers From the receptor To the brain/spinal cord
As an electrical impulse

20. What is the role of the myelin sheath?
2 minutes

21. Answer
Insulates – NOT Protects
The axon and speeds up the impulse

22. Describe the pathway of a nerve impulse through a reflex arc.
3 minutes

23. Answer Receptor cells pick up a stimulus
Sensory neurone sends a message to the spinal cord.
The message travels from the spinal cord to a relay neurone then to the motor neurone
There is a response in the effector

24. Plant growth Hormones What is a seedling?
Which way should shoots grow?
Which way should roots grow?
What is gravitropism?
What is phototropism?

25. Answers
When a shoot emerges from the top of a seed and begins to grow.
Upwards towards light
Downwards towards gravity
Growing towards gravity
Growing towards light

26. Higher level questions
Explain how plant shoots grow towards the light.(You must include the words Auxin and elongation in your explanation)
Explain how plant roots grow towards gravity.(You must include the words Auxin and elongation in your explanation)

27. How shoots grow towards light
AUXIN moves to the shaded side
Causes cell elongation
Shoot bends towards light.

28. How roots grow towards gravity
AUXIN moves to the underside of the root
It Inhibits the elongation of cells on the underside of the root
Cells on the upper side continue to elongate
Root bends downwards