Answer:
A
Explanation:
Artificial means man made or not made by nature basically, meaning that humans breeding organisms for certain characteristics would be artificial.
Earth's tilt on its axis affects the way heat is distributed on Earth's surface.
The Earth orbits the sun every 365 ¼ days. The Earth is tilted 23.5 degrees on its axis, which affects the distribution of the sun’s energy across the surface of the planet. More tilt means more severe seasons, that is warmer summers and colder winters where as less tilt means less severe seasons, that is cooler summers and milder winters.
Find out more on earth tilt at: brainly.com/question/818630
Nitrogen must be converted into nitrates before organisms can use it. If soil lacks nitrogen fixing bacteria, then it has few nitrates for the plants to take in.
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Answer:
Fossil is the name that is used for the trace or remains of an organism that lived long ago, most commonly preserved in sedimentary rock.
Explanation:
Fossils are the remaining parts of the organism's body which lives in ancient times and now they are extinct. Extinct means they are no longer the part of our earth or there is no specie of their kind. Fossil is only be found when the dead bodies of animals buried quickly so the chances of their complete decomposition is less and people will get it during digging after long time.
