a biologist studying a desert ecosystem observes that the population of a lizard species increases following a particularly hot, dry period that causes a snake species to decline. what could the biologists hypothesize about the roles of theses two species? a: the lizard preys on the snake b: the lizard is a parasite of the snake c: the snake and the lizard use the same limiting recourse d: the snake is a keystone species in the ecosystem me its for a huge test and i need the answer!

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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.

chert is a sedimentary rock composed of microcrystalline or cryptocrystalline silica. with this little bit of information, you can come to the conclusion that your answer is c.  

explanation: