What is the age range of adolescence?
- a5 to 10 years
- b10 to 19 years
- c15 to 25 years
- d20 to 30 years
130 questions · 22 sections
What is the age range of adolescence?
Up to what age is the period of childhood counted?
According to the textbook, boyhood is counted between which ages?
At what age does adolescence usually begin in girls?
At what age does adolescence usually begin in boys?
In whom do the changes of adolescence start earlier?
How many kinds of changes occur during adolescence?
At what age do boys generally start growing beard and moustache?
During puberty, the chest and shoulders become broader in whom?
Expansion of the hip bone takes place in whom during puberty?
Consider the following physical changes in adolescence:
Which one is a behavioural change of adolescence?
Which one is a mental change of adolescence?
From where are hormones secreted in the body?
Which two hormones are mainly responsible for changes in girls?
Which hormone is responsible for changes in boys during adolescence?
According to the textbook, menstruation starts at what age range?
In Bangladesh, at what age does menstruation generally stop?
On average, after how many days does the menstrual cycle occur?
How many days does menstruation usually last?
From what age do sperms begin to generate in boys?
Heaviness of voice and growth of beard in boys are caused by which hormone?
What is involuntary ejaculation in sleep called?
According to the textbook, menstruation generally starts between which ages?
Menstruation may continue for how many days?
What can give comfort during abdominal pain in menstruation?
What is the main function of absorbent pads?
Which tendency is common in girls during adolescence?
Who should give mental and emotional support to adolescents?
According to Bangladeshi law, what is the marriage age for girls?
According to Bangladeshi law, what is the marriage age for boys?
Pregnancy takes place when —
Which is an early symptom of pregnancy?
Pregnancy at immature age may cause —
What is willful miscarriage called?
In which country is the rate of early marriage mentioned as very high in the textbook?
Why is a baby born with low weight in early pregnancy?
Who created the first test tube baby in 1959?
The test tube baby Louise Joy Brown was born in which year?
What is in-vitro fertilization?
For how many days did the first test tube baby of Dr. Petrucci stay alive?
How many pairs of chromosomes are there in a human cell?
What are the sex chromosomes of a man?
What are the sex chromosomes of a woman?
All chromosomes other than sex chromosomes are called —
What is the chromosome composition of a human ovum?
If the ovum is fertilized by an X-carrying sperm, the child will be —
If the ovum is fertilized by a Y-carrying sperm, the child will be —
According to the textbook, the sex of a child is determined by —
According to Fig 4.12, which is true about the X and Y chromosomes?
According to the textbook, how long ago was the Earth formed as a hot gas-mass?
The word 'Evolution' comes from which Latin word?
Who first used the term 'evolution'?
Which organism lost its sight due to living in dark caves?
The modern definition of evolution was given by —
According to all theories, life on earth originated in —
About 260 crore years ago, which gas was NOT present in the atmosphere?
Amino acids and nucleic acids were produced from atmospheric gases by —
Which is the correct sequence of early biological evolution?
What is virus considered as?
The nucleus of bacteria is called —
Which gas was first produced as a by-product of photosynthesis by unicellular life?
The external structure of living beings is called —
Which best describes homologous organs?
Which of the following is an example of homologous organs?
What are analogous organs?
Which of the following are analogous organs?
Which of the following best describes vestigial organs?
Which is a vestigial organ in the human body?
Where is the coccyx bone located in the human body?
The heart of fish has how many chambers?
The heart of amphibians has how many chambers?
The heart of reptiles has —
Which group of animals has a four-chambered heart?
Platypus is considered a connecting animal between —
Like which group does the platypus reproduce?
Gnetum is an example of —
Who proposed the principle 'Ontogeny repeats phylogeny'?
What does 'Ontogeny repeats phylogeny' mean?
According to the textbook, every vertebrate embryo has —
The branch of science that discusses extinct organisms is called —
What is a 'missing link' in evolution?
The study of Archaeopteryx fossil proves that —
The plant Pteridosperm shows characteristics of —
Which of the following is an example of a living animal fossil?
How long ago did the arthropod Limulus originate?
Which of the following is a living plant fossil?
In molecular biology, evolution is studied by comparing —
Who coined the word 'Biology'?
Which is the name of Lamarck's famous book?
In which year did Lamarck publish his theory in his book?
According to Lamarck's theory of use and disuse, an organ that is continuously used —
The webbed feet of aquatic birds is an example given to support which theory?
According to Lamarck, why did snakes lose their legs?
According to Lamarck, the long neck of the giraffe is the result of —
Where was Charles Darwin born?
What is the lifespan of Charles Darwin?
The Galapagos Island visited by Darwin is in which ocean?
In which year did Darwin return to England after his voyage?
In which year did Darwin publish 'Origin of Species by Means of Natural Selection'?
Which naturalist reached the same conclusion as Darwin independently?
According to Darwin, how many seeds does a mustard plant grow per year?
How many eggs does a female salmon lay in a breeding season?
According to Darwin, if all offspring of a single pair of elephants survived, their number would reach how much in 750 years?
Who introduced the term 'struggle for existence'?
The food chain peacock-snake-frog-insect is an example of which struggle?
If herbivores increase in number on an island and compete among themselves for food, what type of struggle is this?
The extinction of the quil bird of North and Central America due to cold and snowfall is an example of —
What is variation, according to Darwin?
'Survival of the fittest' means —
Which is the most important topic of Darwinism?
According to modern view (Mendelism + Darwinism), new species can originate by:
In which water did life first originate?
In case of intraspecies struggle —
Which animal will be found in position A of the graph (lay eggs + naked skin)?
What is the position of platypus in the graph?
Based on cell structure, what kind of organism is bacteria?
Which animal is called a connecting link between reptiles and mammals?
Why are physical changes different in boys and girls during adolescence?
Homologous organs are best defined as organs with —
What is inter-specific struggle?
What is nucleoprotein?
Why is the horseshoe crab (Limulus) called a living fossil?
To help Mrs. Santa conceive, the doctor used a special method. Which method is this?
If a woman keeps giving birth only to daughters, the scientific reason is —
What is a sex chromosome?
Why does a brown beetle living on brown soil survive better than other coloured beetles?
The bird's wing, bat's wing and whale's flipper mentioned in the stem support which idea?
Between Lamarck's and Darwin's theories, which is more acceptable to modern scientists?
According to Lamarck, the characteristics earned by living beings during life are —