Passive transport because Passive transport is a movement of biochemicals and other atomic or molecular substances across cell membranes without need of energy input. Unlike active transport.
Bipedalism has several advantages comparing to quadrupedalism:
<span><span>· </span><span>Raising the head - This brings to the greater field of vision, detection of distant predators or food,</span></span>
<span><span>· </span>Speed - the maximum speed of bipedal animals is higher,</span>
<span><span>· </span><span>Non-locomotory limbs - become available for other functions (for example, manipulation, flight).</span></span>
A) A vaccine is developed that prevents individuals being infected
