The domestication of plants and subsequent breeding has given rise to many different familiar crops. the single species of brassica oleracea has given us many different vegetables including: kale; cabbage; broccoli; cauliflower; kai-lan; brussels sprouts and kohlrabi. even though these are all the same species, this is possible because of

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.