The nervous system is the body’s switchboard, sending signals between different parts of the body. the central hub of the nervous system is the brain. the brain is an example of which level of hieratical organization within the body?

a cell
b tissue
c organ
d organsystem

In german cockroaches, curved wing (cv) is recessive to normal wing (cv+). bill, who is raising cockroaches in his dorm room, finds that the frequency of the gene for curved wings in his cockroach population is 0.6. in his friend joe’s apartment, the frequency of the gene for curved wings is 0.2. one day joe visits bill in his dorm room, and several cockroaches jump out of joe’s hair and join the population in bill’s room. bill estimates that, now, 10% of the cockroaches in his dorm room are individual roaches that jumped out of joe’s hair. what is the new frequency of curved wings among cockroaches in bill’s room? 0.69 0.4 0.5 0.31 0.20

What is the correct trna sequence that would match the following mrna sequence.gcgaua

How can you tell the difference between rough er from smooth er?