How can an increase in biodiversity lead to an increase in ecosystem stability?
a. a more biodiverse ecosystem is not subject to change.
b. a more biodiverse ecosystem has a higher chance of adapting to species changes.
c. a more biodiverse ecosystem has fewer species types to balance.
d. a more biodiverse ecosystem is subject to fewer natural disasters.

Biodiversity translates to the variety of species that exist within a set ecosystem. This can be both plant and animal life. A greater biodiversity is considered better as the different species are able to use and benefit from all the different types of environmental resources. This leads to a much more complex ecosystem that isn't reliant on fewer resources and in the case of environmental change can still prevail and adapt accordingly. Had they been reliant on fewer resources, any change to those few resources would have led to greater problems in the entire ecosystem.

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.

the answer that best describes the relative refractory period in the neuron is the resting membrane potential is restored, but concentrations of sodium and potassium are not restored to their original state.

the refractory period is the time during which another stimulus given to the neuron will not lead to a second potential. thus, because na+ channels are inactivated during this time, additional depolarizing stimuli do not lead to new action potentials.  

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