In a lateral-flow pregnancy test, you see a blue band form on the control line and no band form on the test line. this is probably a test for pregnancy.
positive
false-positive
false-negative
negative

negative

Explanation:

Lateral-flow pregnancy test

It is a device use to confirm the prsence or the absence of the target analyte , which can be biomakers or the pathogens .

The very common type of lateral flow rapid test is the pregnancy test .

Lateral - flow technology uses colored nano particles , nitrocellulose membrane and antibodies to produce result of pregnancy .

As the sample is added , it flows along the test device passing via the conjugate pad to the nitrocellulose membrane and then to the absorbent pad.

The blue band on the control;l line and no band on the test line , gives a negative test of pregnancy .

answer : haversian

[explanation: -(compact bone is organized as parallel columns, known as haversian systems, which run lengthwise down the axis of long bones. these columns are composed of lamellae, concentric rings of bone, surrounding a central channel, or haversian canal, that contains the nerves, blood vessels, and lymphatic system of the bone)]