1) Put the geological periods below in order by writing the appropriate number n
ID: 227367 • Letter: 1
Question
1) Put the geological periods below in order by writing the appropriate number next to the name. Then identify the periods in which the events happened by writing the appropriate letter in the right hand column. Events A) Most major animal phyla appear, first chordates. B) First amphibians and insects; first upland plant communities. C) First amniotes; extensive swamp forests; giant insects. D) Largest mass extinction event at end of period. E) First birds and flowering plants; early mammals diverse dinosaurs. F) Radiation of mammals, pollinating insects, teleost fish; first apes. Order (earliest 1, most recent 6) Event (letter from list) Cambrian Carboniferous Devonian Jurassic Permian Tertiary 2) Which of the organisms below is more closely related to crocodiles? Which is more closely related to mammals? Explain. A) Dimetrodon 3) Why would a rise in the availability of oxygen help explain why the Cambrian explosion occurred?Explanation / Answer
2) Dimetrodon (option A) is closely related to crocodile family because dimetrodon belongs to reptile family so crocodile is originated from these reptile family and this dimetrodon aslo comes under mammal category and while coming to duck,its not a mammal, because there is a lot of difference between mammals and birds though both of them lay eggs.Birds have feather while coming to mammals they have fur.
3) Iridum is one of the most important element on the earth surface existing since from the evolution of dinosaurus. Iridium is also used in space purposes such as manifacturing of satellies.The term iridium anomaly commonly reffers to an unusual abundance of chemical element iridium in the layers of rock strata at the cretaceous-paleogene boundary.The evidence of iridium can be observed not only on earth surface,its is pesent abundantly on meteorites. Ofcourse our earth is also one of the meteorite before many billions of years ago....this is the reason there is an element present on the earth surface.
4)The evolution of cambarian explosion starts about 540 million years ago which gave boost up for the origination of various animals which we are seeing and the rise in availabilty of oxygen helps in increasing the lifespan of humans and every organisms especially humans.Also it is more useful for present polluted environment.
8) Generally the duty of mosquitoes is to suck blood from humans and animals inorder to survive themselves from hunger. This make humans to get attacked by some kind of dangerous viruses and cause severe viral diseases and finally leads to death. The reason behind these diseases are, mosquitoes,when they suck blood from one person,it carry some virus or tiny parasites along with thier blood and after few hours again when it bites other person,it starts injecting that virus to others which leads to some viral diseases like malaria,dengue etc..
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