The refractory period is.. i. an increase in the electrical gradient across a membrane ii. a period when the neuron is insensitive to depolarization iii. a decrease in the electrical gradient across a membrane a. ii only b. i and ii only c. i only d. i, ii, and iii e. iii only

Which of the following would most likely be key to gathering evidence that the rna world hypothesis is valid? creation of suitable environments for long-term study of single-celled organisms simulation of early earth conditions and long-term study of the resulting molecules development of a system for studying the microsphere's ability to absorb additional molecules categorization of the different specific conditions that result in the development of microspheres

Chicken pox and hepatitis are bacterial diseases. true or false?

What are the 3 types of artificial cloning