Test-MCQ Class 10-NCERT -Science-Chapter 9-Test-2 Chapter 9: Heredity and Evolution Multiple Choice Questions No of Questions : 15 Marks: 15 Please enter your email: 1. From the list given below, select the character, which can be acquired but not inherited. colour of skin nature of hair colour of eye size of body 2. According to the evolutionary theory, formation of a new species is generally due to accumulation of variations over several generations. sudden creation by nature. clones formed during asexual reproduction movement of individuals from one habitat to another 3. Select the incorrect statement. Traits which are not inherited over generations do not cause evolution. Frequency of certain genes in a population changes over several generations resulting in evolution. Low weight parents can have heavy weight progeny. Reduction in weight of the organism due to starvation is genetically controlled. 4. In human males all the chromosomes are paired perfectly except one. This/these unpaired chromosome is/are I. large chromosome II. small chromosome III. Y-chromosome IV X-chromosome Only III II and IV III and IV I and II 5. Rajneesh was studying the fossils of two different types, fossil A was found in upper layer of Earth and B in deeper layers. What can be predicted regarding the age of these fossils? A has recently become extinct None of the any B has become extinct recently The time of extinction cannot be determined 6. A Mendelian experiment consisted of breeding tall pea plants bearing violet flowers with short pea plants bearing white flowers. The progeny all bore violet flowers, but almost half of them were short. This suggests that the genetic makeup of the tall parents can be depicted as TTWW TtWw TtWW TTww 7. Exchange of genetic material takes place in asexual reproduction budding vegetative reproduction sexual reproduction 8. Two pink coloured flowers on crossing resulted in 1 red, 2 pink and 1 white flower progeny. The nature of the cross will be double fertilisation cross fertilisation self pollination no fertilisation 9. A cross between a tall plant (TT) and short pea plant (tt) resulted in progeny that were all tall plants because tallness is the recessive trait tallness is the dominant trait height of pea plant is not governed by gene ‘T’ or ‘t’ shortness is the dominant trait 10. Which of the following statement is incorrect? For every molecule of fat there is a gene For production of every enzyme there is a gene. For every protein there is a gene. For every hormone there is a gene. 11. The maleness of a child is determined by the X chromosome in the zygote the Y chromosome in zygote sex is determined by chance the cytoplasm of germ cell which determines the sex 12. A basket of vegetables contains carrot, potato, radish and tomato. Which of them represent the correct homologous structures? Carrot and tomato Radish and potato Radish and carrot Carrot and potato 13. Select the correct statement Wings of birds and wings of bat are homologous Wings of birds and limbs of lizards are analogous Tendril of a pea plant and phylloclade of Opuntia are analogous Tendril of a pea plant and phylloclade of Opuntia are homologous 14. If the fossil of an organism is found in the deeper layers of earth, then we can predict that the fossil position in the layers of earth is not related to its time of extinction the extinction of organism has occurred recently the extinction of organism has occurred thousands of years ago time of extinction cannot be determined 15. Which of the following statements is not true with respect to variation? Selection of variants by environmental factors forms the basis of evolutionary processes. Variation is minimum in asexual reproduction Change in genetic composition results in variation All variations in a species have equal chance of survival Please Enter Your Name, School Name & Class in the given below box and submit: ( results will be shown on this page within few moments after submit ) Loading … Question 1 of 16
