Flashcards in Failed Qs In Paper 1 Deck (18):
Why is adrenaline needed for running away from a predator?
It increases heart rate
T/F increases blood flow to the muscles
How can a specific breed be produced using selective breeding?
Breed X with other animals.
You will get some X and some normal.
Continue this for many generation with just the Xs
Function of the retina?
How does keeping chickens in a factory affect egg production.
They move less
They respire less
Less heat is lost
They have more energy for egg production
Name some biotic factors that should be controlled in a experiment involving humans.
How does EPO decrease tiredness?
Which carries the oxygen
When respiring aerobically
So there’s less oxygen debt.
What happens when pollen lands on the stigma?
When pollen grains land on the stigma of a flower of the correct species they germinate. A pollen tube grows through the tissues of the flower until it reaches an ovule inside the ovary. The nucleus of the pollen grain then passes along the pollen tube and joins with the nucleus of the ovule.
After fertilisation the female parts of the flower develop into a fruit. The ovules become seeds and the ovary wall becomes the rest of the fruit.
What happens to a plant cell if it’s put in a concentrated salt solution?
Water leaves the cell via osmosis (H-L)
The concentration of water in the cell goes from high to low, leaving the cell flaccid.
How is the palisade mesophyll layer adapted for P/S?
Many chloroplast which absorb the light
How is the spongy mesophyll layer adapted for P/S?
It has air spaces for the diffusion of gas
How are the guard cells adapted for P/S?
They can open or close the stomata allowing CO2 in for P/S
What happens if a plant is left in a dark cupboard?
The starch gets used up
What are similarities between phototropism and reflexes in animals?
Differences between phototropism and reflexes in humans?
Chemical vs electrical
Fast (animal) slow (plant)
Muscle contractor vs plant growth
Number of chromosomes in the unfertilised gamete is...
What molecule does fungus use to store carbohydrates?
What are the thread-like structures that make up the mycelium of a fungus?