Question

Fossils are remains of plants and animals that lived a long time ago that reveals to the scientists about a plant or animals' life. Many fossils are the remains of plants and animals that are extinct. Extinct means they are no longer living and none is left on the Earth. Fossils have been found on every continent in mountains, under water, in valleys, ice and many more places. Paleontology is the study of fossils and about life from long ago. Paleontologists estimate that only a small percentage of dinosaurs and other animals or plants that ever lived have been or will be found as fossils. One type of fossil is the remains of the dead organisms of imprint left by the remains. A second type of fossil is something that was made by the animal while it was living but has turned into stone. The bones and teeth are hard minerals parts of animals that become fossils after an animal dies. The animal's body is buried in mud or other sediment and the teeth and bones do not rot like the rest of the animal's body. After a long time, the chemicals in the buried animals' bodies undergo many changes. As the bone slowly decays, water filled with minerals seeps into the bone and replaces the chemicals in the bone with other minerals that are as hard as a rock. Fossilization is the name of this process. Fossils come in many colours and are made of many different types of minerals, depending on where fossilization took place. Most fossils are dug up from sedimentary rock layers. Sedimentary rock is a rock that has formed from sediment, like sand, mud and small pieces of rock. Small pieces of an animal's remains become squeezed between the layers of this sediment. Over long periods of time, they are buried under more and more layers of sediment that piles up on top of it. Fossils are usually heavier than the original item since they are formed entirely of minerals. Most fossils are made of ordinary rock material. Fossils do have the same shape that the ordinary item had, but their colour, thickness, and surface may be different. The degree to which the remains are decayed when covered determines the later details of the fossil. Fossils usually consist of the portion of the organisms that was partially mineralized during life, such as the bones and teeth of vertebrates or the chitinous or calcareous exoskeletons of invertebrates. However, other fossils contain traces of skins, feathers or even soft tissues. Answer ANY FIVE from the following questions. 1) What, according to you are fossils? (5 * 1 = 5) C 2) State the meaning of the word "Paleontology". 3) How do fossils form in the earth? 4) Pick out the word that means "the matter that settles to the bottom of a liquid" a) seeps b) sediment c) decay d) chemical 5) What about the colour and weight of fossils in nature? 6) Entitle the passage suitably.​

Answer 1

Answer:

AOB=2∠ACB=2×35=70

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ln ΔAOB⇒∠A=∠B

(Angles opposite to equal sides)

∴∠A+∠B+∠O=180

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2∠A+70

∘

=180

∘

∠A=55

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=∠OAB

Answer 2

Answer:

When chemically analyzed, we learned that fossil ink has the same infrared spectra and contains the same form of melanin (a dark pigment) as modern day cephalopod ink. It is organic pigments, such as melanin, that primarily determine the colors of today's animals.