DDT was used during second world war to control malaria among the troops and the civilians. Later, it was used as pesticide in agricultural and household practices. Due to its excessive use it entered into the food chain and its amount in the food crossed the permissible level. So, it was banned by United States.
Answer:
A reflex, or reflex action, is an involuntary and nearly instantaneous movement in response to a stimulus. A reflex is made possible by neural pathways called reflex arcs which can act on an impulse before that impulse reaches the brain.
Explanation:
Umm ok? I’m not sure what the question is asking.
The greenhouse effect is necessary to explain
why weather occurs. The climate of the Earth is greatly affected by two
opposing processes: the greenhouse effect and atmospheric convection. The
greenhouse effect is acting to warm the lower atmosphere and cool the
upper atmosphere while the atmospheric convention (composed of thermals,
clouds, precipitation) is cooling the lower atmosphere and warms the upper
atmosphere). <span>The greenhouse effect warms the Earth’s surface, but very few people are
aware that weather processes greatly limit that warming.<span> In the absence of greenhouse effect, the Earth will
be left without weather.</span></span>
OBTAINING A WRITTEN CONSENT FROM THE PATIENT IS ESSENTIAL before an ELISA test is performed.
ELISA test is a test that is used to detect and measure antibodies in the blood. Antibodies related to certain infections, such as HIV, can be detected by this test. A positive ELISA result indicates that the patient is infected.
ELISA stands for Enzyme Linked Immunosorbent Assay.<span />
