Traits can be , which means they can be seen and are capable of masking a different trait.

Traits can also be
, which means they can be masked.

Alleles are different versions of the same
in an organism.

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.

dude i stopped reading after the first 7 words but hey you seem real smart thats awesome have a great day

what are the options

the answers are as following:

1. c. double helix, nucleosome, coil, supercoil, chromosome

2. b. g2 phase, preparation for mitosis

3. d. interphase consists of the g1, s, and g2 phases

4. c. metaphase

5. a. chromosomes are duplicated before cell division so that each new daughter cell has a complete set