Radial symmetry can be likened to a pizza or bicycle wheel, where all the parts are equal and arranged around a central axis.
An example of organism with radial simetry is the hydra if you take a central axis and planes that contain that axis both sides would be symetrical
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.
no pls tell me if i am wrong
Answer:
PCR makes it possible to sequence the tiniest amount of DNA from crime scenes.
Explanation:
PCR is a process where regions of DNA are amplified to create lots of copies of the DNA. This creates enough material for the lab assistants to be able to analyze the DNA, including sequencing, gel electrophoresis, and other techniques.
This is helpful in crime scenes, where sometimes there are very small amounts of DNA that need to be analyzed.