Species
Characteristics
Scientists were studying three different embryos to
determine their relationship to humans. The notes
about each embryo are shown in the chart. Based on
the information, what can you determine?
O
Species A and B are related to humans.
has gill slits
O Species A and C are related to humans.
O Species B and C are not related to humans.
O Species A and C are not related to humans.
contained in a seed
has a tail

16. a brave but inadequate rugby player is being pushed backward by an opposing player who is exerting a force of 800 n on him. the mass of the losing player plus equipment is 90.0 kg, and he is accelerating at 1.20m/s2 size 12{1 "." "20"" m/s" rsup { size 8{2} } } {} backward. (a) what is the force of friction between the losing player’s feet and the grass? (b) what force does the winning player exert on the ground to move forward if his mass plus equipment is 110 kg? (c) draw a sketch of the situation showing the system of interest used to solve each part. for this situation, draw a free-body diagram and write the net force equation.