Dominance occurs when one individual achieves preferential access to resources, including food, cover and mates over other individuals. This may

be achieved through submission or smaller body size.

false.

Dominance occurs when an organism possessed an allele -which is homozygote or heterozygote  dominant for a particular allele ( dominant allele),over any other gene (recessive allele) in the population. such  gene is expressed  from generation to generation irrespective of the recessive allele.

An organism which inherit such gene, therefore will be at advantage in the population will greater access to the natural resources available for survival, while the less dominant one population dwindles and disappear with time. Thus the dominant population will be naturally selected, and evolve with time.

Explanation:

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.

i believe it would cause an increase of percipitation, though i could be wrong. so i would say b is the answer.