Which lists the elements in order from most conductive to least conductive? potassium (k), selenium (se), germanium (ge) germanium (ge), potassium (k), selenium (se) selenium (se), germanium (ge), potassium (k) potassium (k), germanium (ge), selenium (se)

The right option of this question is (D) as

Potassium → Germanium → Selenium

In the period, as the trend increase from left to right, the property of electrical conductivity of the elements decreases. There is the number of factors that affect this property such as moving from left to right in the period, the number of protons and electrons increase but the electrons remain in the same shell. Its mean the increasing number of proton exerts more force of attraction on the electrons of the outer shell. That force of attraction reduces or remove the ability of the element to conduct electricity. But increasing number of electrons in the same shell also increase the electrons repulsion. As we see in the periodic table, the Potassium exists in the metallic group but Germanium and Selenium exist almost in the nonmetallic group. So, the right option is (D).

cell differentiation  is how generic embryonic  cells  become specialized  cells. this occurs  through a process called gene expression. gene expression is the specific combination of genes that are turned on or off (expressed or repressed), and this is what dictates how a  cell  functions.

explanation:

answer: the exterior temperature of commercial jet planes as they leave the stratosphere and return to the ground increases steadily.

explanation:

the lower most layer of atmosphere is troposphere which extends from 0 to 12 km above the surface of the earth. the temperature initially decreases as distance is increased from the earth's surface. commercial jets fly in lower part of the stratosphere. the stratosphere extends upto 50 km. the temperature in stratosphere starts rising again due to presence of ozone which traps the uv rays.

thus, when the planes leave the stratosphere and return to the ground, the exterior temperature increases steadily.