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Which of the following is/are true for adolescence?
1. The period of life, when the body undergoes changes, leading to reproductive
maturity.
2. Adolescence generally begins around the age of 10 and lasts upto 18 or 19 years
of age.
3. The changes mark the onset of puberty.
Which of the following is/are true for hormones?
1. Hormones are chemical substances.
2. They are secreted by exocrine glands.
3. They are controlled by pituitary gland.
What is/are true for sex determine:
1. It is determine by sperm.
2. It is carried by sex chromosome.
Which of the following is/are correctly matched?
1. Thyroid —————————————————————————- thyroxine.
2. Pancreas —————————————————————————— insulin.
3. Metamorphosis ——————————————————— growth hormone.