Circle two reasons why gene expression is regulated in prokaryotic cells

Can someone i have no idea of how to do this.

What part of the cell does 9 represent? a. cytoplasm b. lysosome c. ribosome d. centrosome

1. you serve a volleyball with a mass of 2.1 kg. the ball leaves your hand with a speed of 30 m/s. the ball has energy. calculate it. 2. a baby carriage is sitting at the top of a hill that is 21 m high. the carriage with the baby weighs 12 n. the carriage has energy. calculate it. 3. a car is traveling with a velocity of 40 m/s and has a mass of 1120 kg. the car has . calculate it.