15. The U. S. Energy Independence and Security Act of 2007 mandates... fuel producers use at least 39 gallons of biofuels by 2025
fuel producers use at least 53 gallons of biofuels by 2021
fuel producers use at least 36 gallons of biofuels by 2019
fuel producers use at least 36 gallons of biofuels by 2022

Which of the following is a way that minerals are used? a. industry construction technology d. all of the above

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.

Give two examples of what would occur if one of the pairs did not match or had an extra chromosomes. explain how this might occur, and if it would be dangerous to the individual. fast.