Digestion is the process of complex molecules in food being broken down into smaller molecules so the body can use them. this process takes place in the digestive system. name three organs that take part in digestion and describe their function within the system. (answer in complete sentences.)

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? question 8 options: the cold balloon expands and rises. the warm balloon shrinks and sinks. the balloons rise at the same rate. both balloons are the same size. the ballons both rise. the cold ballon is larger than the warm balloon. the warm balloon expands and rises. the cold balloon shrinks and sinks.

When a population split into two subgroups what is most likely to cause the subgroups to develop different traits?

Achemical that is released by an animal as a signal to other members of the same species is called a pheromone. t or f