Page 3 - Cl8-Bio_CBQ_Reaching the age of adolescence

normal level. The table below-shows the average range of blood sugar levels at fasting

Doctors prescribe insulin, injections for patients with high blood sugar levels.
(a) Name the gland which produces insulin in our body.
(b) Why do doctors prescribe insulin injections for patients when insulin is already
produced in the body?
13. Heights of students of four different sections of Grade 8 are measured. The table shows
the percentage of maximum height up to which the students in each section have
grown

(a) In which class have both the boys and the girls reached the end of puberty?
(b) What can be concluded from the table about the height of adolescent boys and
girls?
14. Statement-1-An ovum contains one X chromosome.
Statement-2-A sperm contains an X or a Y chromosome.
Statement-3-A sperm can fertilize an ovum to produce two different zygotes
Explain the statements with help of a flow chart.
15. In a family there are two children and both are daughters. Identify their sex and also
mention the parent (father/mother) from whom they receive the chromosome