A litter of puppies from two black labradors is being born. The first 3 pups are black, yellow, and brown, respectively. Based on the B and E genes regulation of coat color, what is the likelihood that the next pup will be black

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.

but there is no

i guess you forgot putting it.

hydrogen is a compound or a single element and a element is a pure substence that cannot be separated into simpler subtances

clorine is a compound its a chemical substance that forms when two or more different elements combine

so both hydrogen and clorine are compounds