BIO Paper 1B 2022 Flashcards
Differences between nervous and endocrine system
Nervous system:-
- pass through nerve cell
- Uses electrical impulses
- Transmit neurones
- goes to specific target cells
- Very fast
- Short/ until electrical impulses stop
Endocrine system:
- pass through glands
- uses hormones
- transmit through blood stream
- goes to all body / diff organ
- takes long time
- long term/until hormone breaks down
Fungi’s y is usually organised
into a mycelium made from thread-like structures called…
Hyphae
Fungal cells walls are made of
chittin
Fungi feed by extracellular secretion of …………. onto food
Enzyme
Fungi secretion of enzymes onto food are called what?
Saprotrophic nutrition
How student measure rate of gas production
- use gas syringe
- measure volume in time
What to say at the end every time question ask for experiment
- Repeat
- Calculate average
Give other variables that can affect a person’s vital capacity.
Vital capacity is maximum value of air person can force out in one breath
- Smoking
-Asthma - sex
- pollution
- How active you are
- Life attitude
What do you have to do before labelling pyramid of dry mass
Times dry mass with number of organism
Describe how you could collect data to find the mean number of producers
per square metre in the ecosystem.
- place quadrat (at random)
- take random sample
- count amount of producer
- repeat
Adaptation for wind pollination
-big and not Coloured petal’
- Anther hang so pollen blows in wind
- feathery stigma to catch pollen
- long filament to help disperse pollen
- no nectar
-pollen is light
What is immune response
- response to antigens
- by white blood cells
- white blood is produced
Give the function of three different components of a balanced diet.
- fibre for peristalsis
- carbohydrate for energy
- protein for growth and repair
Why offspring is black when mom is black and dad is white
Because black allele is expressed in heterozygous
State the name of the type of genetic control where many genes control
one phenotype.
Polygenic
