Class 8 Reaching The Age Of Adolescence CBSE Questions & Answers

Class 8 · Reaching The Age Of Adolescence

This is Science Class 8 Reaching the Age of Adolescence CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
Which mineral is essential for formation of thyroxin?
  • A
    Iodine
    Correct
  • B
    Magnesium
  • C
    Calcium
  • D
    Iron
2
The process of changing tadpole to frog is called
  • A
    Metamorphosis
    Correct
  • B
    Fertilization
  • C
    Copulation
  • D
    Megaspores
3
Reproduction is essential life processes which help in
  • A
    Change in size
  • B
    Remain alive
  • C
    Change in habitat
  • D
    Continuity of race
    Correct
4
Secondary sex organs develops under the influence of
  • A
    Nutrition
  • B
    Enzyme
  • C
    Hormones
    Correct
  • D
    Temperature
5
The period of pregnancy is known as
  • A
    Menstruation
  • B
    Incubation period
  • C
    Gestation period
    Correct
  • D
    Blastulation
6
Human beings are
  • A
    Regular breeder
  • B
    Non-seasonal breeder
    Correct
  • C
    Occasional breeder
  • D
    Seasonal breeder
7
The release of egg from ovum is described as
  • A
    Reproduction
  • B
    Ovulation
    Correct
  • C
    Menstruation
  • D
    Insemination
8
Which of the following is not a secondary sexual feature?
  • A
    Moustache
  • B
    Pimples
  • C
    Body hair
  • D
    Ovulation
    Correct
9
Menstrual cycle, in human female is completed in
  • A
    27 days
  • B
    30 days
  • C
    31 days
  • D
    28 days
    Correct
10
All organism reproduce sexually after certain growth and maturity. That period of growth is called
  • A
    Juvenile phase
  • B
    Growth phase
  • C
    Reproductive phase
    Correct
  • D
    Flowering phase
11
Every sexually reproducing organism, including human being begin life as a single cell called
  • A
    Embryo
  • B
    Gamete
  • C
    Spore
  • D
    Zygote
    Correct
12
Which of the following is a primary sex organ?
  • A
    Ovary
    Correct
  • B
    Vagina
  • C
    Fallopian tube
  • D
    Uterus
13
Ovulation occurs on the ___________ day of menstrual cycle.
  • A
    12 to 14
  • B
    14 to16
    Correct
  • C
    Last
  • D
    8 to 10
14
Hormone responsible for milk ejection after the birth of baby is:-
  • A
    Progesterone
  • B
    Prolactin
  • C
    Oxytocin
    Correct
  • D
    Estrogens
15
Menstrual cycle is repeated at an average interval of
  • A
    One year
  • B
    29 days
    Correct
  • C
    25 days
  • D
    15 days