passive: doesn't require energy, from high to low concentration
active:requires energy, from low to high concentration
i dont know maybe
Answer:
plant cell
Explanation:
They are found in bacteria, archaea, fungi, plants, and algae. Animals and most other protists have cell membranes without surrounding cell walls.
Answer:
I think it would be geographic range. Hope this helps.
The respiratory membrane is made of two layer that comes from alveoli and the blood vessel. Oxygen and carbon dioxide will diffuse between the layer. The rate of diffusion can be influenced by the gradient of the gas concentration, the surface area of the reaction and the distance between the vessel and alveolus.
The thin membrane will reduce the distance of the diffusion, thus increasing the diffusion rate.
A thicker membrane will impede the speed of the diffusion, makes the respiratory organ function decline. This can be observed when the lung inflammed(by infection, cancer or other cause), makes the fluid from blood vessel enter the interstitial space.
Answer:
B.
Explanation:
The answer is B, because bee farmers create false bee hives for h.bees to start a hive. They also can purchase a queen, (that reproduce more bees) that is her only job. The worker bees collect pollen and mix it with the bee's saliva to store honey for the hive, which also is food 4 the bees.
