The answer is; chromosomes.
During interphase, the chromosomes are usually hard to visualize even under a microscope becaue they are long thin threads called chromatin. During the initiation of mitosis, the chromatin undergo structural changes that condense and shortens them and they becomes visible to even a light microscope.
Answer:
Sodium-Potassium pumps (proteins that help neurons generate electricity) are produced by ribosomes on the rough endoplasmic reticulum (ER).
Explanation:
Sodium-Potassium Pump (NA+/K+):
The Na+/K+ Pump is a transmembrane channel protein, responsible for maintaining the concentration gradient of sodium and potassium ions in the intra and extracellular environment. This is achieve by pumping 3 Na+ outside and 2 K+ inside the cell at the cost of one ATP. In neurons, these channels help in generating an action potential across the cell membrane that gives rise to a nerve impulse.
Production of Transmembrane proteins:
All membranes and their proteins are produced by the ribosomes on the rough ER. The rough endoplasmic reticulum contains the enzymes required for lipid synthesis; and as cell membranes are made of lipids, the ER is the most suitable location for synthesis. Membrane proteins, particularly, transmembrane proteins like the Na+/K+ pump possess hydrophobic surfaces that don't dissolve in the cytoplasm but readily attach to the ER surface from where they can be transported wherever required.
It is predation. How?
What do you think will happen if the fox catches the rabbit.
The fox will eat it.
Thus, predator-prey relationship; the fox gets full, and the bunny, well, it's not so good.
I think it's A. They have a cell membrane.
Hope this helps!
