Bio U06 USA FY21 Question: 1:3 The client homind fel, muy la estimated to be 32 million years old. This ewly tumanike species shares an important characteristie with modem tumawa: bipedalium. Which of the foliowe would lover the selection of
bipedal postureover walking on all foun?
Bipedia posture lowed for greater mobility in the tree canopy
Bpedes posture allowed arms to be free to develop and use tools
Dipedal posture allowed for an increase in hominid brain and jaw sire
O Bipedal posture allowed a greater tumber of offspring to be produced in hominich,
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many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.

imagine a line passing through the center of earth that goes through both the north pole and the south pole. this imaginary line is called an axis. earth spins around its axis, just as a top spins around its spindle. this spinning movement is called earth's rotation. at the same time that the earth spins on its axis, it also orbits, or revolves around the sun. this movement is called revolution.