Is there a way to easily remember the types of bonds for the basic chemistry in Bio? I always mix them all up!

short answers( Just few words) Basic bio, answer them all and I will rate you Why do wrinkles form? There are really two major reasons. One involves the sun and another fibroblasts. Can you elaborate? Why do scars form? How do they form? Will they form if the skin is cut with a knife down into the stratum spinosum? What are the two primary functions of the papillary plexus of capillaries?

We touched on introns and exons in my bio class, butunfortunately we didn't really talk about why Eukaryotes haveintrons. It would seem they would have to have some purpose sinceprokaryotes do not have them and they evolved firstchronologically, but I could easily be wrong. Did the junk sectionsof DNA just evolve there by some sort of randomness or necessity asopposed to an actual evolutionary advantage? Why hasn't evolutionstopped us from having introns since they seem to be a 'waste' oftime and DNA? Why do prokaryotes not have introns?

i'm working as a diy bio. I'm finding a way to create a microglass capillary for picking up single cells. I see this video onyoutube and would like to know what is the minimum I/O diameter ifI pull a capillary like this. Can it be 10-50