Anew antagonist molecule has been discovered that binds to and blocks plasma membrane receptors. what effect will this antagonist have on testosterone, a steroid hormone?
it will block testosterone from binding to its receptor.
it will block testosterone from activating camp signaling.
it will increase testosterone-mediated signaling.
it will not affect testosterone-mediated signaling.

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explanation:

plate tectonics and volcanic euptions

over time, plate tectonic processes cause continents to move to different positions on the globe.

for example, britain was near to the equator 300 million years ago, and therefore was hotter than it is today. for further details look at our climate through time poster or online map.

the movement of the plates also causes volcanoes and mountains to form and these too can contribute to a change in climate.

mountain ranges formed by plate tectonics. large mountain chains can influence the circulation of air around the globe, and consequently influence the climate.   warm air might be deflected somewhere cooler by the mountains.

answer///alimentary canal/gastrointestinal tract.digestive (gi);