Origin and Evolution of life  Quiz-15

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NEET is the most famous and important medical entrance examination held in our country. This exam is an objective type, an offline test which includes 4 sections namely– Physics, Chemistry, Botany, and Zoology. The maximum marks that can be scored are 720 marks and have 180 questions. About half of the paper consists of questions from Biology, as the NEET exam essentially focuses on capacitating students to go for seats in medical courses. One of the most significant and crucial sections in the NEET exam is of Biology. It comprises of theories, descriptions, discoveries, diagrams, definitions, explanations of differences, and relations. The majority of the topics covered in the NEET syllabus are from the NCERT syllabus of Class 11 & 12 and other related sources become part of the rest of the syllabus. Clear Exam curates a list of articles selected by professionals who recommend the highly vital topics for NEET exams. The table below takes you directly to the respective topic where the in-depth article and the MCQs are available for an easy and productive learning experience. Prior to solving NEET question papers or practicing mock tests, you must ensure to study the basic concepts in NEET and practice a few sample questions related to this exam. Students will be covered for all their studies as the topics are available from basics to even the most advanced. .

Q1. Fossils are useful in
  •  Studying extinct organisms
  •  Studying history of organism
  •  Both (a) and (b)
  •  None of the above

Q2. organs shows adaptive radiation. Complete the given statement with an appropriate option given below
  •  Homologous
  •  Analogous
  •  Progressive organs
  •  Similar in structure
Homologous organ. Concept of adaptive radiation in evolution was developed by HF Osborn in 1902. Adaptive radiation is also called divergent evolution. Homologous organ shows the adaptive radiation

Q3. Anthropogenic actions that leads to evolution is the use of
  •  Herbicides
  •  Pesticides
  •  Antibiotics
  •  All of these
Excess use of herbicides, pesticides, etc., has only resulted in the selection of resistant varieties in a much lesser time scale. This is also true for microbes against, which we employ antibiotics or drugs. Hence, resistant organisms/cells are appearing in a time scale of month or years and not centuries. These are the examples of evolution by anthropogenic action. This also tells us that evolution is not a directed process in the sense of determinism. It is a stochastic process based on the chance events in nature and chance mutation in that organisms

Q4. The brain capacity of Homo erectus was about
  •  650 cc
  •  900 cc
  •  1200 cc
  •  1400 cc
Homo erectus had a large brain having cranial capacity 900cc.

Q5.Which of the following presumably possesses a cranial capacity larger than modern man?
  •  Neanderthal man
  •  Peking man
  •  Australopithecus
  •  Cro –magnon man
  Cromagnon man is closest ancestor of modern man. The cranial capacity was highest (1680cc). It lived in France and Spain. It made paintings inside cave and ornaments of ivory. The feeding habit was omnivore. He had aesthetic sense.

Q6. Which of the following statement are correct about Homo erectus I. Had a large brain around 900cc II. Appeared about 1.5 million years ago III. Ate meat/omnivorous IV. Evolved from Homo habilis Choose the correct option
  •  I and II
  •  II and III
  • III and IV
  •  I, II, III and IV
Features of Homo erectus are as follows (i) They appeared about 1.7-1.5 million years ago (ii) They evolved from Homo habilis. He was about 1.5-1.8 m long (iii) The cranial capacity was 800-1300 cc cranium was domed to accommodate large brain

Q7.Neo-geographic speciation can be found in
  •  Parapatric speciation
  •  Peripatric speciation
  •  Allopatric speciation
  •  Sympatric speciation
Allopatric speciation. Speciation is an evolutionary process by which new biological species arises. There are five types of speciation : allopatric, peripatric, parapatric, and sympatric and artificial (i) Allopatric Speciation It occurs when a species separates into two separate groups which are isolated from one another. A physical barrier, such as a mountain range or a waterway, makes it impossible to breed with one another. Each species develops differently, based on the demands of their unique habitat or the genetic characteristics of the group that are passed on to offspring (ii) Peripatric Speciation When small groups of individuals break off from the larger groups and forms new species, this is called peripatric speciation. As in allopatric speciation, physical barriers make it impossible for numbers of groups to interbreed with one another, the main difference between allopatic speciation and peripatric speciation is that in peripatric speciation, one group is much smaller than the other (iii) Parapatric Speciation A species is spread over a large geographic area. Although it is possible for any member of the species to mate with another member, individuals only mate with those in their own geographic region (iv) Sympatric Speciation Some scientists don’t believes that this form exists. Sympatric speciation occurs when there are no physical barriers preventing any member of a species from mating with another and all members are in close proximity to one another. A new species, perhaps based on a different food source of characteristics, seems to develop. The theory is that some individuals becomes dependent on certain aspects of an environment-such as shelter or food sources, while others do not (v) Artificial Speciation Is the creation of new species by people. This is achieved through lab experiments, where scientists mostly research insects like fruit files, and in animal husbandry. Animal husbandry is the care and breeding of livestock (animals). Many agricultural products, such as dairy, meat and wool, depends on animal husbandry

Q8.Which of the following animal extinct recently?
  •  Draco
  •  TDinosaur
  •  Mammoth
  •  Pteridosperms
A mammoth is any species of the extinct genus mammuthus. They are commonly equipped with long, curved tusks and, in northern species, a covering of long hair is present. They lived from the Pliocene epoch (from around 5 million years ago) into the Holocene at about 4,500 years ago in Europe, Asia and America as far south as Mexico. They were members of the family Elephantidae which contains, along with mammoths, the two genera of modern elephants and their ancestors

Q9.The modern man differs from the apes in
  •  Protruding eyes
  •  Spare body hair
  •  Wearing of clothes
  •  Arms shorter than legs
The modern man differs from the apes in arms, which are shorter than legs.

Q10. Why the genetic variation is important from an evolutionary standpoint/
  •  If all organisms were the same, the entire population would be vulnerable to particular pathogens, like viruses
  •  All evolutionary adaptations (e.g., the origin of forelimbs) are the result of the gradual build up of genetic difference between organisms over geological time
  •  Evolution (at the population level) refers to changes in the frequencies of genes in the population overtime
  • All of the above
Any condition which brings changes in the genetic frequency are important from an evolutionary point of view

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Origin and Evolution of life Quiz-15
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