Afarmer is planning to grow genetically modified corn on his land that has no irrigation and limited rainfall. which
genetic modification would best this farmer grow crops?
-a protein from potatoes that can make crops drought-tolerant
-an enzyme from peanuts that can make the skins of some foods tougher
-a protein from spinach that vegetables photosynthesize the sun's energy more efficiently
-an enzyme from oak trees that plants produce more seeds

humans are now responsible for causing changes in the environment that hurt animals and plant species. we take up more space on earth for our homes and cities. we pollute habitats. human activity often changes or destroys the habitats that plants and animals need to survive.

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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the water is warmed up by the sun and then it evaporates into the atmosphere. the sunlight warms the water by its heat. water is then cooled down and condensation takes place. the water then finally returns back to the earth by the process of precipitation in the form of rain or ice.

explanation: