N what cellular function does the structure shown here play a role? two bundles of tubes
A. They play a major role in protein synthesis.
B. They act as the powerhouse for the cell.
C. They are involved in the separation of chromosomes during cell division.
D. They are involved in photosynthesis.

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.

Which of these conditions most likely produces an unstable isotope?

As changes in energy levels of electrons increase, the frequencies of atomic line spectra they emit