Ncert – class 8- science – Chapter 7: Reaching the Age of Adolescence 2 Welcome to your Ncert - class 8- science - Chapter 7: Reaching the Age of Adolescence 2 1. Which of the following is NOT a secondary sexual characteristic feature of girls? The menstruation begins. The deepening of voice. The enlargement of breasts. The growth of hair at armpit. None 2. A Which of the following processes involves the fusion of a male and female gamete? Fission Insemination Implantation Fertilization None 3. Why is a diet rich in proteins essential at puberty? the formation of strong bones and teeth For supplying sufficient energy protection from diseases For the formation of new cells during growth None 4. What causes changes in females at the time of puberty? Sex hormones Sex cells Enzymes Nutrients None 5. Which chromosomes determine the sex of an individual? Autosomes Plasmid Allosomes Giant chromosomes None 6. The menstrual cycle stops in a women at about 50 years old. The woman is said to have reached adolescence menarche puberty menopause None 7. Which of the following does not take place during the final stage of the menstrual cycle? Ovulation Both (B) and (C) Further thickening of the uterine lining. Repair and growth of the uterine lining. None 8. Arjun kept losing weight even though he was taking his meals regularly. He felt thirsty all the time. When the doctor tested Arjun's urine, the test showed a high concentration of glucose. What disease is Arjun suffering from? Goitre Cancer Diabetes mellitus. Cirrohsis of the liver. None 9. Which of the following hormones initiates metamorphosis in insects? Thyroxine Insulin Adrenaline Growth hormone None 10. Which of the following pairs of hormones and minerals is associated with the occurrence of goitre? Minerals- iron, Hormones -Insulin Minerals - calsium, Hormones - Thyroxine Minerals - iodine, Hormones -Thyroxine Minerals-Phosphorus, Hormones -Adernaline None 11. Which of the following is called the master gland in the human body? Adrenal Thyroid Islets of Langerhans Pituitary None 12. Which of the following is/are true of secondary sexual characteristics of boys? Development of bones and muscles Growth of facial hair All of these Production of sperms None 13. When do girls overtake boys in height? Adulthood Adolescence Childhood Old age None 14. Which of these hormones is secreted by endocrine gland located on the top of kidneys? Adrenaline Insulin Testosterone Progesterone None 15. The given table has various stages. W - The ovum dies within 24 hours after ovulation. X - The uterus wall thickens with blood vessels. Y - The uterus wall breaks down. Z - The ovary discharges an ovum. Which of these sequence is correct of the menstrual cycle? Z, X, Y, W W, Y, X, Z X, Z, W, Y Y, W, Z, X 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 comment Enter your email address to comment Enter your website URL (optional) Save my name, email, and website in this browser for the next time I comment.
