Bio Paper 2 Flashcards
(13 cards)
male gamete produced in flowers/ plants
pollen
Abiotic factors examples (FOUR)
Temperature
water
soil
light
Biotic factors examples (FOUR)
Plants
animals
bacteria
fungi
Effect of and explanation of insulin on blood glucose
lowers blood glucose levels because glucose is converted into glycogen and used in respiration by cells etc.
What is a mutation
A change in DNA/ genetic code
why does an animal’s body temp want to drop in cold weather during hibernation
to lose less energy/ keep energy in store
why does body temp go up when you are active
activity requires respiration and respiration releases heat.
why does blood vessels dilating cool the body down
more blood flow to the skin
more blood loses heat
cooling the blood which cools body down
Dangers of rearing animals indoors. TWO
Increased risk of spread of disease
Aggressive behaviour/emotional stress
Benefits of rearing animals indoors
Lose less heat energy
Lose less energy due to less movement.
Process by which water is absorbed into plant roots
osmosis
Where in the human body are amino acids turned into urea
Kidneys
FOUR harmful substances that could cause water pollution
Pesticides
Herbicides
Sewage
Fertiliser
