EVOLUTION
EVIDENCE FOR EVOLUTION
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
fossils in upper layers complex and lower layers complex
|
|
|
fossils in upper layers simple and lower layers complex
|
|
|
fossils in upper layers complex and lower layers simple
|
|
|
fossils in upper layers simple and lower layers simple
|
Detailed explanation-1: -Key Points. Fossils are the preserved remains or traces of animals, plants, and other organisms from the past. Fossils are important evidence for evolution because they show that life on earth was once different from life found on earth today.
Detailed explanation-2: -Fossils usually form when the organisms die and get buried due to different reasons. The bodies or remains of the organisms then get covered by ashes, sand, lava, or soil to form layers over them. These layers get hardened over time due to different factors like pressure.
Detailed explanation-3: -To establish the age of a rock or a fossil, researchers use some type of clock to determine the date it was formed. Geologists commonly use radiometric dating methods, based on the natural radioactive decay of certain elements such as potassium and carbon, as reliable clocks to date ancient events.
Detailed explanation-4: -The oldest layers are on the bottom, and the youngest layers are on the top. Because sediments sometimes include once-living organisms, sedimentary rock often contains a lot of fossils. Fossils are once-living organisms that have been turned into rock, in which the shape or form of the organism can still be seen.