13. What innovation did Jethro Wood add to plows in the 1800s? O A. Iron on the plow blade made it easier to cut through soil.
B. Plows made from wood were lighter and easier to handle.
O C. Plows that threshed and winnowed grain saved time.
O D. Plows that separated cotton seeds from fibers made cotton harvesting much
easier.

Construct an explanation about the function of mitosis for multicellular organisms

Which box will not accelerate? 4 newtons 4 newtons 4 newtons 25 kg 4 newtons 15 newtons 10 kg 30 newtons 40 newtons 50 kg 30 newtons 30 newtons

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.