Which statement best describes the role of the nucleus in a cell? The gate at a factory keeps out unwanted cars.
The elevator at a factory moves materials around the building.
The boss at a factory gives out orders and directions.
The boxes at a factory are used to ship materials to customers.

Secondary pollutants are more harmful than primary pollutants. select the best answer from the choices provided ot of

Ascientist separates a population of mice into two groups. what would most likely increase the rate of speciation in this population. a. teach the two groups different tricks b. allow the two groups to breed with each other c. put the two groups in different environment d. have the two groups live in identical ecosystems

What is the main fuel source for the work of the cell