10. Cuando los colonizadores europeos llegaron a las planicies de los EEUU dañaron el ecosistema de dos maneras.
a) Cazando grandes animales y cortando todos los pastos de las praderas para
cultivarlas.
b) Acumulando en represas grandes cantidades de agua y desviando los ríos.
c) Cazando mamut y vendiendo su piel a mercaderes.
d) Cazando tigres hasta extinguirlos además de eliminar las praderas de
Norteamérica.

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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what the squwock

explanation:

answer: after carbon dioxide enters the leaf through stomata it moves into the mesophyll cells where photosynthesis occurs and glucose is constructed. respiration occurs when glucose (sugar produced during photosynthesis) combines with oxygen to produce useable cellular energy.

explanation: