The function of chordae tendineae is:
a) to contract when the ventricles contract
b) to hold the right and left ventricles together
c) to hold the av valves open during diastole
d) to transmit the electrical impulse from the atria to the ventricles
e) to keep the av valves from everting during ventricular contraction

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.

What is the main fuel source for the work of the cell

Grasses--> mice--> cats--> coyotes suppose 10,000 units of energy are available at the level of the grasses. what is the total number of energy units lost by the time energy reaches the coyote?