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. Thyroxin produced by Pituitary gland Testes Adrenal gland Thyroid gland None 2. Which of the following statements is true? Between the age of 4 to 12, girls grow faster than boys. At the end of rapid growth, girls are normally heavier than boys. Girls reach puberty earlier than boys. Boys reach puberty at an earlier age than girls. None 3. What causes changes in females at the time of puberty? Nutrients Enzymes Sex cells Sex hormones None 4. Which gland release insulin hormone? Liver Pancreas Thyroid Pituitary None 5. Deficiency of which hormone cause diabetes? Insulin Estrogen Testosterone Thyroxin None 6. Glands without ducts Pancreatic gland Endocrine glands Exocrine gland Mammary gland None 7. AIDS is a sexually transmitted disease caused by HIV, a _________. Fungi Protozoan Bacteria Virus None 8. Structures present in a cell which is responsible for determination of the sex of a baby is cytoplasm cell membrane nucleus chromosome None 9. Metamorphosis in insects is controlled by ____________ hormones. Adrenal Insect Pituitary None of the above None 10. AIDS can spread from an infected person to another person through mosquito bite. sharing food. sharing comb. blood transfusion. None 11. 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? (ii), (i), (iii), (iv) (i), (iv), (ii), (iii) (i), (ii), (iii), (iv) (ii), (iii), (i), (iv) None 12. Which of the following is a female hormone? Testosterone Estrogen Insulin Growth hormone None 13. For the metamorphosis of tadpoles which of the following elements must be available in water? Iodine Sulphur Chlorine Carbon None 14. The most conspicuous visible change that occurs in boys during puberty is increase in height. development in voice box. production of sperms. increased sweating. None 15. The belief that the mother is completely responsible for the sex of the child is wrong because the child develops in the body of the mother. gets sex chromosome only from the mother. gets one sex chromosome from the mother and the other from the father. gets sex chromosome only from the father. None 16. Larynx is called Voice box Music box Respiratory organ None of these None 17. Insulin controls the blood _________ levels. Salt Platelets WBC Sugar None 18. The drastic change that occurs during the life cycle of a frog when it changes from larva to an adult is termed as Adulting Puberty None of the above Metamorphosis None 19. In a frog, the process of metmorphosis is controlled by thyroxine, the hormone produced by____________. Adrenal None of the above Thyroid Testes None 20. The period of maturity of reproductive organs is called. Adolescene period Gestation period None of these Mensuration 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.
