Producción de leche, cabello, temperatura corporal constante y sistemas circulatorios y respiratorios altamente desarrollados.
Answer:
The correct answer is option d. "Protein movement is limited by the presence of a diffusion barrier".
Explanation:
There are transportation mechanisms that allow to take up nutrients to the apical surface of the epithelial cells. The transportation process is best describes as protein movement limited by the presence of a diffusion barrier. There are structures known as tight junctions, located just below the apical surface . These tight junctions acts as diffusion barriers, separating the extracellular fluids surrounding the apical and basolateral membranes.
Answer:
Do you mean planets?
if so,The heavy rocky particles within the inner part of the disk formed planetesimals and eventually, inner planets. In our solar system, the four innermost planets Mercury, Venus, Earth and Mars are known as inner planets. They lie inside the asteroid belt. They have volcanoes and valleys and are very hot compared to outer planets.Inner planets are much smaller than the outer planets, and are rocky with an iron core.
Hope that helps!
Option B)
They prevent most of the Sun's rays from reaching Earth, thereby preventing Earth from heating up
Answer: Frictional Force
Explanation: Friction always acts to oppose any relative motion between surfaces. For the simple example of a book resting on a flat table, the frictional force is zero.
