Atruck slows down. which claim about the forces acting on the truck must be true? choose 1 choose 1 (choice a) a there are no forces on the truck. (choice b) b there is no net force on the truck. (choice c) c there is not enough information. (choice d) d there is a net force on the truck.

"There is a net force on the truck" is true about the forces acting on the truck.

Explanation:

When truck is in contact with the road and is moving, several forces acts on the moving truck.

The net force is a sum of the forces that acts in opposite directions and same directions. When the truck is moving there is a normal force of the road acting upwards which is balanced by the weight of the truck that acts downward.

cell differentiation  is how generic embryonic  cells  become specialized  cells. this occurs  through a process called gene expression. gene expression is the specific combination of genes that are turned on or off (expressed or repressed), and this is what dictates how a  cell  functions.

explanation:

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.