NEET Biology Graded A Q&A Complete

Phenomenon when organisms resembling others for escaping from enemies is - mimicry Employment of hereditary principles in the improvement of human race is - Eugenics Homeostasis is - tendency to change with change in environment Pedology is science of - soil Study of fossils is - Paleontology A nucleotide is formed of - nitrogen base, sugar, and phosphate Glycogen is a polymer of - glucose Adenine is - purine In RNA, thymine is replaced by - uracil The CO2 content by volume in the atmospheric air is about - 0.0314% Which one of the following is a living fossil? - Ginkgo biloba Warm ocean surge of the Peru Current recurring every 5-8 year or so in the East Pacific of South America is widely known as - El NinoIf there was no CO2 in the earth's atmosphere, the temperature of earth's surface would be - less than the present An orchid resembling the female of an insect so as to be able to get pollinated is due to the phenomenon of - pseudocopulation The most important feature of all living systems is to - replicate the genetic information Relative Biological Effectiveness (RBE) is usually referred to damages caused by - radiation First life on earth was - chemoheterotrophs What is true for photolithotrophs? - Obtain energy from radiations and hydrogen from inorganic compounds Most abundant organic compound on earth is - cellulose Reason of diversity in living being is - long term evolutionary change Organisms which obtain energy by the oxidation of reduced inorganic compounds are called - chemoautotrophs There is no life on moon due to the absence of - water Which one of the following is categorized under living fossils? - Cycas According to Oparin, which one of the following was not present in the primitive atmosphere of the earth? - oxygenAge of fossils in the past was generally determined by radio-carbon method and other methods involving radioactive elements found in the rocks. More precise methods, which were used recently and led to the revision of the evolutionary periods for different groups of organisms, include - Electron Spin Resonance (ESR) and fossil DNA More than 70% of world's fresh water is contained in - Polar ice Barophilic prokaryotes - grow and multiply in very deep marine sediments Carbohydrates, the most abundant biomolecules on Earth, are produced by - sme bacteria, algae, and green plant cells Which of the following is the relatively most accurate method for dating of fossils? - Electron-spin resonance method Animals have the innate ability to escape from predation. Examples for the same are given below. Select the incorrect example. - Poison fangs in snakes Praying mantis is a good example of - social insects Which one of the following is not a living fossil? - Archaeopteryx Which one of the following is an example of negative feedback loop in humans? - Constriction of skin blood vessels and contraction of skeletal muscles when it is too cold The living organisms can be unexceptionally distinguished from the non-living things on the basis of their ability for - reproduction Biological organization starts with - submicroscopic molecular levelWhich one of the following scientist's name is correctly matched with the theory put forth by him? - Weismann- Theory of continuity of Germplasm Humming birds and hawk illustrate - adaptive radiation 'Origin of species' was written by - Darwin