Which advantages does the skeleton of birds provide for flight?
a. light hollow bones
b. volume and heavy weight for lift
c. rigid structure to anchor strong muscles for flight
d. loosely unconnected bones

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.

Suppose you were the commissioner of corrections for your state. which correctional activities might come within your domain? which mostly would not

Using meiosis, the sporophyte produces spores that are .