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Biological vector is an organism that carries and spreads infectious diseases.

 The low pH of the stomach easily destroys most pathogens that enter the body through the nose and mouth?

Another word for adaptive immunity is:

Find all the points on y = -2 that are 6 units from the point (6,5).   Click ‘True’ when finished.

Two tangents to a circle each have a length of 16 and meet at a 60 degree angle.  Find the shaded area :   Click ‘True’ when finished

A circle with a 5 inch radius is centered at O and a circle with a 10 inch radius is centered at Q, where O and Q are 15 inches apart.  There is a segment that is tangent to the small circle at P and to the large circle at R.  Find the lengths of the quadrilateral OPRQ.   Click ‘True’ when finished

Apply the Angle-Bisector Theorem to the smallest angle of the right triangle whosesides are 1, 1, and √2. A side of length 1 is divided by the bisector into segments of whatlengths?   Click ‘True’ when finished

Find a point that is 4/5 of the way from point A (-1, 5, 3) to point B (5, -9, -1).   Click ‘True’ when finished

To get full credit, you must draw the three similar triangles in the same orientation (hypotenuse on the bottom) with all vertices and marked lengths labeled.  Find the values of x and y:     Click ‘True’ when finished

Solve for the value of x :   Click ‘True’ when finished