Malaria, a type of parasite, infects 500 million people each year by infecting the red blood cells of its host. The virus, HIV, that causes AIDS, reports 50,000 newly infected persons. Which statement best differentiates the pathogens, parasites and viruses? options: Although both rely on other living organisms to survive, viruses are usually beneficial.

Although both rely on other living organisms to survive, parasites feed on the host organism.

Although both are living organisms, viruses break down dead plants and animals that other organisms use.

Although both are living organisms, parasites depend on the cells of living things to reproduce.

Imagine ? person stepping on a pin and pulling his or her foot way look at the réfléchir arc of the scenarios below

1. seamount a raised footwall block between normal fault creates this 2. syncline break between rocks where a hanging wall rises relative to a footwall 3. hot spring on rolling hills, this a dip between hills 4. volcanic neck created when a block with hanging walls slips down between normal faults 5. caldera underwater volcano that never reaches above sea level 6. horst natural hot water on earth's surface containing many minerals 7. graben underwater volcano whose top is eroded flat by waves 8. crater less than a mile in diameter; looks like a bowl at the top of a volcano 9. guyot magma that filled the central vent that remains after the volcano has eroded 10. reverse fault over 1 mile in diameter; looks like a bowl over a volcano

Several billion years ago which gas was the least prevailant in the atmosphere