Download 22. The maintenance of a stable internal environment 23. Brain and

B1 Knowledge test Answers
1.
Kingdom
Animalia
Protoctista
2 features
multicellular, no cell walls, no chlorophyll, feed
heterotrophically
multicellular, have cell walls, have chlorophyll, feed
autotrophically
multicellular, have cell walls, no chlorophyll, feed
saprophytically
unicellular, have a nucleus
Prokaryote
unicellular, have no nucleus
Plantae
Fungi
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A group of similar organisms that can reproduce to give fertile offspring
Backbone/supporting rod
Gills, lungs, skin
Lays eggs
Maintain their body temperature (warm blooded)
Variation
Mammals, birds
Continuous e.g. height, weight and discontinuous e.g. eye colour, hair colour, blood group
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11. Genes and environment
12. A change in an organisms DNA
13. Variation, Over production, struggle for existence, survival, advantageous characteristic inherited, gradual
change
Feature
Reason
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15. A section of DNA/a chromosome that codes for a
Small ears
Reduce heat loss
particular characteristic.
Thick fur
Insulation
16. A version of a gene
17. Any letter Hh
Large feet
Spread weight, help
18. hh
swimming, stop it
19. The outward characteristics caused by the genes
sinking in the snow
20. Painful joints, fatigue, shortness of breath, irregular
Rough soles
Grip
heart beat, jaundice
Thick blubber
Insulation
White fur
Camouflage
21. Persistent cough, recurrent chest infections, mucus in the lungs, infertility, underweight, does not produce
digestive enzymes
22. The maintenance of a stable internal environment
23. Brain and Spinal cord
24. Light sensitive cells in the retina
25. Axon
26. The junction between two neurones, Neurotransmitter
27. Fat, Insulate the axon
28. Reflex
29. Blood
30. Insulin
31. Glucagon
32. Lack of insulin, Controlled diet and injecting insulin
33. A person being resistant to insulin, Physical activity and diet
34. A growth response to light
35. Towards the stimulus
36. Auxin or gibberellin
37. Breaks it down
38. .
Type of drug
Painkiller
Depressant
Stimulant
Hallucinogen
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Example
Morphine
Alcohol
Caffeine
LSD
Effect on body
Blocks nervous impulses
Slows reactions
Speeds up reactions
Distorts/changes senses and
perceptions
Nicotine
Causes cancer, Tar
Blurred vision, lowering of inhibitions, slowing of reactions (Not gets you drunk)
Liver cirrhosis, brain damage
Bacteria, virus, fungi, protozoa
Lysosyme in tears, stomach acid, mucus
Feeds off them
Eats parasitic insects from it
On another tree
Mutualism
Dead skin from other fish
Respiration, burning fossil fuels, decomposition