As frequency decreases, wavelength will decrease as well.
Cell surface or membrane is made of phospholipid bilayer with embedded proteins and sugars. Cell membrane acts as a barrier between cell and its external environment but it is also responsible for the communication with other cells and transport of molecules inside and outside the cell. It is selectively permeable to ions and molecules (some of them pass through the membrane easily, while others require transport proteins or channels). There are 4 ways of molecule transport:
1. Diffusion – no energy required
2. Facilitated transport – transport proteins included
3. Active and co-transport – energy required
4. Vesicle transport (exocytosis and endocytosis)
Microvilli are extensions of cell membrane that increase its surface for diffusion.
Different types of cell junctions have a different influence on the membrane transport. For example, tight junctions are a barrier and the molecules are unable to pass through.
It's B
Hope that helps, Good luck! (:
The correct answer for this question would be option B. Greenhouse gases are needed for the survival of life on Earth because without greenhouse gases, Earth would be too cold for life to exist. Hope this answers the question. Have a nice day.
As helicase unwinds DNA at the replication fork, the DNA ahead is forced to rotate. This process results in a build-up of twists in the DNA ahead.<span>As </span>helicase<span> unwinds DNA at the replication fork, the DNA ahead is forced to rotate. This process results in a build-up of twists in the DNA ahead.</span><span>This build-up forms a torsional resistance that would eventually halt the progress of the replication fork. Hope this helps </span>