Which of the following is not true concerning the layers of the earth?
a.
the core is mostly composed of metals.
b.
the mantle has both solid and liquid regions.
c.
the layers of earth are uniform in thickness.
d.
the lithosphere includes both the crust and upper, solid mantle.

C. The layers of Earth are uniform in thickness.

Explanation:

The earth is made up of three layers, the crust, the mantle and the core. Each layer has different characteristics and temperatures, becoming warmer as it approaches the core.

The Earth is formed by three layers that are not uniform in thickness, composition, or characteristic. These layers are:

the right answer is a. skin cells forming from sunlight.

the liver is an organ endowed with a fantastic ability to regenerate

. thus, if a hepatectomy (ablation) of 70% of the hepatic mass is performed in the rat, there is complete recovery in 7 to 10 days.

prokaryotes are beings that have existed since the existence of life on earth, and do not come from another realm.

ribosomes are organelles that exist naturally in eukaryotes, either in free form or attached to the endoplasmic reticulum.

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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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