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