Which is a reason that many organisms that have existed on Earth have left no fossils?A.Fossils cannot form underwater.B.Many organisms live only in rainforests.C.Fossils can only form near volcanoes.D.Fossils decay according to their half-life.
Question
Which is a reason that many organisms that have existed on Earth have left no fossils?A.Fossils cannot form underwater.B.Many organisms live only in rainforests.C.Fossils can only form near volcanoes.D.Fossils decay according to their half-life.
Solution
The reason that many organisms that have existed on Earth have left no fossils is not listed in the options provided. However, a correct answer could be that not all conditions are favorable for fossilization. For an organism to become a fossil, it usually needs to die in a location where its body can be quickly covered by sediment. This is why many fossils are found in water environments like rivers, lakes, and oceans. If an organism dies and its body isn't quickly covered by sediment, it can be scattered and destroyed by scavengers, or decay from exposure to oxygen and bacteria. Therefore, many organisms that have died on land or in locations where their bodies weren't quickly covered by sediment have left no fossils.
Similar Questions
Select all that applySelect all of the following that explain why the fossil record is incomplete.Multiple select question.Many organisms decomposed before they were buried in sediments.Erosion and movements of the Earth's surface have destroyed many fossils that did form.Fossils were not formed south of the Wallace Line due to proximity to the equator.Many fossils may never be discovered because they are buried deeply or submerged under water.Fossils older than 100 million years old have already decayed past the point of recognition.
Which statement about the fossil record is true?Choose 1 answer:Choose 1 answer:(Choice A) The fossil record can show roughly when species appeared but not when they went extinct.AThe fossil record can show roughly when species appeared but not when they went extinct.(Choice B) The fossil record shows that life has existed on Earth for billions of years.BThe fossil record shows that life has existed on Earth for billions of years.(Choice C) The fossil record is made up of a subset of the fossils that have been found on Earth.CThe fossil record is made up of a subset of the fossils that have been found on Earth.12 of 30SkipCheck
Fossils can be formed when conditions needed for __________ are absent.
What factor prevents us from finding fossils from the Precambrian era?A.Life was destroyed by a series of mass extinctions.B.This was before life existed on Earth.C.Life-forms in this era had no skeletons.D.There are no rocks left from that era.
Which of the following best describes the fossil record?Multiple choice question.It is a complete record of species that have existed on Earth.It is incomplete, except for a few types of organisms such as horses, whales, and humans.It is an incomplete record of species that have existed on Earth.
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