Do porcupines have definite nucleus?​

option a is correct i.e.

explanation:

in context to the membrane of nerve impulse, the outer membrane of neuron is semi permeable that is only sodium ions can pass through the membrane i.e. smaller ions can pass through the membrane while larger ions cannot pass through it.

it's unlikely a majority of a large population would agree on issues

hope this : )

yes!

explanation:

because it has a type of fat that can make you extremely sick