Sentences with phrase «caused by living organisms»

Astronomers» current strategy for finding life on another planet is to detect the chemical composition of that planet's atmosphere, on the look - out for chemical imbalances which could be caused by living organisms.

Not exact matches

They are all caused by microbes — minute organisms which have fascinated us ever since the Dutch merchant Anton van Leeuwenhoek discovered the invisible but teeming world of «small life» in the 17th century.

The new work, by James Mitchell at the Harvard School of Public Health and colleagues, suggests that holding back calories causes cells to produce hydrogen sulfide, which somehow makes tissues more resilient and prolongs the life of laboratory organisms.

Sunburn in living organisms is caused by ultraviolet (UV) light from the sun damaging the DNA in the cells.

An obvious question is how cellular senescence caused by deficient DNA repair finally affects the aging of a living organism.

Changing living conditions caused by climate change or ocean acidification — the decrease of ocean pH due to the uptake of human - induced carbon dioxide from the atmosphere — pose serious threats to marine organisms.

Even if such efforts succeed, they won't necessarily cause native Mars life to be swamped by microbes from Earth, Rummel said — especially if Red Planet organisms exist only underground, where they're shielded from harmful radiation.

Giardia is an intestinal parasite caused by a single - celled organism that lives in the intestines of infected animals.

Giardia: an intestinal parasite caused by a single - celled organism that lives in the intestines of infected animals.

While not a worm, Giardia is an intestinal parasite caused by a single - celled organism that lives in the intestines of infected animals.

When stressed by sustained high temperatures, the coral organisms that build reefs sometimes expel the symbiotic algae living in their tissues, causing affected areas to turn white or pale.

«Forest trees can be long - lived organisms, and it is possible that «demographic inertia» (inertia caused by long lifespans and slow community turnover) in the forest system may delay any forest dieback.

Trichomoniasis is not caused by an intestinal parasite — it's caused by a different organism, called Trichomonas vaginalis, that usually lives in the vagina.

STDs caused by viruses include herpes and genital warts, and the viruses that cause them aren't even technically living organisms — they are pieces of genetic information that are able to infect a host cell.

But some STDs are caused by other types of living organisms.