Answer:
B. Mutation
Explanation:
Mutation is a chamge in DNA sequence.
Answer:
E. that area of the membrane is in the absolutely refractory period.
Explanation:
Refractory period is a period during which neuron cell cannot be stimulated (depolarized). This is why the action potential can only travel in one direction from the neuron body towards axon.
Refractory period occurs because of the inactivation of voltage-gated sodium channels (while action potential is at its peak) which cannot be open for a certain period of time. and membrane cannot be depolarized.
Answer:
The Cell Membrane.
Explanation:
To enter or leave a cell, the substance must pass through the cell membrane. (plasma membrane)
Answer: The Kelvin Helmholtz Waves is one of the rarest clouds. along with the Lenticular Cloud, Fallstreak Hole, Roll Cloud, and Nacreous Cloud.
Explanation: The Kelvin Hemholtz occurs when two different layers of air in our atmosphere are moving at different speeds (a phenomenon known as shear). ... The most obvious example is wind blowing over water, in which fast-moving air can create the waves on the slower-moving water. The lengicular cloud is caused when the air is stable and winds blow across hills and mountains from the same or similar direction at different heights through the troposphere. The nacreous cloud is caused when the temperature in the stratosphere is below a chilly -78°C, which turns any moisture in the air into super-cooled liquid or ice crystals. ... This light is refracted by the ice crystals in the clouds, a process known as cloud iridescence, producing the shimmering rainbow effect.