Ncert – class 8- science – Chapter 7: Reaching the Age of Adolescence 1 Welcome to your Ncert - class 8- science - Chapter 7: Reaching the Age of Adolescence 1 1. For the metamorphosis of tadpoles which of the following elements must be available in water? Carbon Iodine Chlorine Sulphur None 2. Which of the following is a female hormone? Testosterone Estrogen Growth hormone Insulin None 3. Which of the following statements is true? Between the age of 4 to 12, girls grow faster than boys. Girls reach puberty earlier than boys. Boys reach puberty at an earlier age than girls. At the end of rapid growth, girls are normally heavier than boys. None 4. Insulin controls the blood _________ levels. Platelets WBC Salt Sugar None 5. Given below are events that lead to pregnancy and development of embryo. Fertilisation of eggMaturation of eggRelease of eggEmbedding of embryo in thickened uterine wallWhich of the following options gives the correct order of sequence in which they occur? (i), (ii), (iii), (iv) (i), (iv), (ii), (iii) (ii), (i), (iii), (iv) (ii), (iii), (i), (iv) None 6. Larynx is called Voice box None of these Respiratory organ Music box None 7. The belief that the mother is completely responsible for the sex of the child is wrong because the child gets one sex chromosome from the mother and the other from the father. gets sex chromosome only from the mother. gets sex chromosome only from the father. develops in the body of the mother. None 8. Metamorphosis in insects is controlled by ____________ hormones. Insect None of the above Pituitary Adrenal None 9. Glands without ducts Pancreatic gland Exocrine gland Endocrine glands Mammary gland None 10. Which gland release insulin hormone? Liver Pancreas Thyroid Pituitary None 11. Deficiency of which hormone cause diabetes? Thyroxin Insulin Testosterone Estrogen None 12. AIDS is a sexually transmitted disease caused by HIV, a _________. Protozoan Bacteria Fungi Virus None 13. The most conspicuous visible change that occurs in boys during puberty is development in voice box. increase in height. increased sweating. production of sperms. None 14. The drastic change that occurs during the life cycle of a frog when it changes from larva to an adult is termed as None of the above Puberty Adulting Metamorphosis None 15. What causes changes in females at the time of puberty? Enzymes Sex cells Nutrients Sex hormones None 16. Structures present in a cell which is responsible for determination of the sex of a baby is cell membrane cytoplasm chromosome nucleus None 17. Thyroxin produced by Pituitary gland Adrenal gland Thyroid gland Testes None 18. In a frog, the process of metmorphosis is controlled by thyroxine, the hormone produced by____________. Thyroid None of the above Testes Adrenal None 19. AIDS can spread from an infected person to another person through sharing food. blood transfusion. mosquito bite. sharing comb. None 20. The period of maturity of reproductive organs is called. None of these Mensuration Adolescene period Gestation period None Time's up Please Share This Share this content Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Leave a Reply Cancel replyCommentEnter your name or username to commentEnter your email address to commentEnter your website URL (optional) Save my name, email, and website in this browser for the next time I comment.
