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