1. Before giving a speech to the class, Johnny becomes very nervous: His eyes dilate, glands release sweat, and his blood vessels become wider. How will this affect Johnny s blood flow before his speech
a. The larger blood vessels will decrease the vessel diameter and increase blood flow throughout his body
a. His nervousness will have no effect on his blood flow
a. There will be too much blood so his blood will flow slowly.
a. His blood will become too viscous to flow through, causing Johnny to faint before his speech.

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

How do you transfer mrna into codons ? i'm so confused : (

Explain why ecosystem diversity results in species diversity in a healthy biosphere