Which substance is considered a building block for all living things?

Can anyone explain to me the "all or nothing law" of action potentials? I'm in a college physiology class, and I do not understand this concept.

In an axosomatic synapse, neurotransmitter is released from?

Draw Conclusions In 6-8 sentences, explain how stream volume and speed affect the size, shape, and flow of streams and rivers. Use evidence from the Water Erosion Lab and Virtual Stream Table Activity to support your claims.

Roughly, how many mutation occur every time one of our cells divide

What are the two main stages of cell division called?

In guinea pigs, black fur is dominant and white fur is recessive. A homozygous dominant black guinea pig is bred with a homozygous recessive white guinea pig. The dominant allele is represented by F, and the recessive allele is represented by f.

Is Antares or vega hotter than the sun

How do levels of acid rain and so2 emissions relate to each other

Which is a function of the protein hemoglobin? regulate blood sugar transport oxygen through the blood contract muscles build muscles

How many stands does DNA Have