Which of the following is an example of a buffer? salt hemoglobin metal plasma

The correct answer is just hemoglobin

Iassume the answer is 75 feet. inwards to outwards rather than outwards to inwards. probably be 75.hachures are stokes drawn in direction of the steepest slope. a series of short parallel lines drawn on a map to indicate topographic relief. it is actually called hachures on contour lines. the small marks in the center of the feature are called hachures.observe the picture attached

The fertilized egg  begins to develop into a hollow ball of cells called the blastocyst.