AP BIOLOGY

EVOLUTION

DARWIN’S THEORY OF NATURAL SELECTION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following describes fossils?
A
large organisms that live on Earth now
B
traces of organisms that lived in the past
C
the fate of all organisms now on Earth
D
preserved in igneous rock
Explanation: 

Detailed explanation-1: -Trace fossils are marks left by an animal or plant that has made an impression. These fossils include nests, burrows, footprints or any other markings of the animal’s time on the earth. The structure of the animal or plant remains as a mineral form.

Detailed explanation-2: -These fossilised behaviours are known as trace fossils. Trace fossils can include animal footprints, bite marks, coprolites (fossil dung), or a preserved nest or burrow. They might tell us about how an organism moved, where and how it lived, what it ate, and how it hunted and socialised.

Detailed explanation-3: -Fossils are the preserved remains, or traces of remains, of ancient organisms. Fossils are not the remains of the organism itself! They are rocks.

Detailed explanation-4: -What is a fossil? Fossils are the preserved remains of plants and animals whose bodies were buried in sediments, such as sand and mud, under ancient seas, lakes and rivers. Fossils also include any preserved trace of life that is typically more than 10 000 years old.

Detailed explanation-5: -Ichnofossils, also known as trace fossils, are geological records of the activities and behaviors of past life. Some examples include rock evidence of nests, burrows, footprints, and scat. These fossils are different from body fossils that preserve the actual remains of a body such as shells or bones.

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