Which statement is true about DNA? Group of answer choices

. DNA contains genes that hold specific traits for an organism.

Organisms create their own DNA sequence that is not like their parents.

DNA is an exact copy from parent to offspring.

DNA is not necessary for an organism to reproduce.

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? a. the balloons both rise. the cold balloon is larger than the warm balloon. b. the balloons rise at the same rate. both balloons are the same size. c. the warm balloon expands and rises. the cold balloon shrinks and sinks. d. the cold balloon expands and rises. the warm balloon shrinks and sinks.

If you add 10ml of hot water to 10ml of cold water and the change in tempature 8°c calculate how much energy is gained by the cold water

Asolution contains 180 g of glucose (c6h12o6) and 162 g of water. what is the mole fraction of glucose?