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. size of body colour of skin nature of hair colour of eye 2. According to the evolutionary theory, formation of a new species is generally due to sudden creation by nature. movement of individuals from one habitat to another accumulation of variations over several generations. clones formed during asexual reproduction 3. Select the incorrect statement. Reduction in weight of the organism due to starvation is genetically controlled. 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. 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 I and II III and IV 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 sexual reproduction asexual reproduction vegetative reproduction budding 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 cross fertilisation self pollination no fertilisation double fertilisation 9. A cross between a tall plant (TT) and short pea plant (tt) resulted in progeny that were all tall plants because height of pea plant is not governed by gene ‘T’ or ‘t’ tallness is the recessive trait tallness is the dominant trait shortness is the dominant trait 10. Which of the following statement is incorrect? For every hormone there is a gene. For production of every enzyme there is a gene. For every molecule of fat there is a gene For every protein there is a gene. 11. The maleness of a child is determined by the X chromosome in the zygote the cytoplasm of germ cell which determines the sex the Y chromosome in zygote sex is determined by chance 12. A basket of vegetables contains carrot, potato, radish and tomato. Which of them represent the correct homologous structures? Radish and potato Carrot and tomato Carrot and potato Radish and carrot 13. Select the correct statement Wings of birds and limbs of lizards are analogous Tendril of a pea plant and phylloclade of Opuntia are homologous Tendril of a pea plant and phylloclade of Opuntia are analogous Wings of birds and wings of bat are homologous 14. If the fossil of an organism is found in the deeper layers of earth, then we can predict that the extinction of organism has occurred recently time of extinction cannot be determined the fossil position in the layers of earth is not related to its time of extinction the extinction of organism has occurred thousands of years ago 15. Which of the following statements is not true with respect to variation? Variation is minimum in asexual reproduction All variations in a species have equal chance of survival Selection of variants by environmental factors forms the basis of evolutionary processes. Change in genetic composition results in variation 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
