Question 4 :
Is the statement correct : Reproduction happens generally in two modes. These are Sexual reproduction and Asexual reproduction. ?
Question 6 :
Fill in the blanks. Amoeba is a __(a)___ celled organism. It reproduces by _____(b)_____ reproduction. The process of reproduction begins by the division of its ______(c)____ into two. This is followed by the division of its _____(d)______ into two. This type of reproduction is called _____(e)_____ fission.
Question 9 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d0a6f59b460d7261f32c.PNG' />
In the above image, what is A?
Question 10 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d0a7f59b460d7261f32d.PNG' />
In the above image, what is B?
Question 13 :
In humans, the development of fertilised egg takes place in the
Question 14 :
In human beings, the correct sequence of events during
reproduction is
Question 15 :
In Fertilisation , the zygote divides repeatedly to give rise to a ball of cells and further develops into ________.
Question 16 :
State the following statement True or False:-
The transformation of the larva into an adult through drastic changes is called metamorphosis.
Question 17 :
External fertilisation can occur both in water and on land. TRUE or FALSE?
Question 18 :
In markets, eggs of birds are available but never eggs of dogs. Why?
Question 23 :
Egg laid after fertilisation is made up of a single cell.
Question 27 :
The female reproductive organs are a pair of ovaries, _________ and the uterus
Question 28 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d0a5f59b460d7261f32b.PNG' />
In the above image, What happens during this process and what is formed?
Question 30 :
State True or False for the following statement:-
Viviparous animals lay eggs.
Question 32 :
Animals exhibiting external fertilisation produce a large number
of gametes. Pick the appropriate reason from the following.
Question 33 :
Among human being, cow, dog and hen. Hen is odd one out. Choose the correct reason for this.
Question 35 :
The process of the fusion of the gametes is called ___________
Question 36 :
Mother gives birth to a baby but the baby has characters of both parents. How is this possible?
Question 37 :
The embryo gets embedded in the wall of the ___________ for further development, in Fertilisation.
Question 40 :
The eggs of frogs do not have shells for protection, yet they are safe in water. How?
Question 41 :
A tadpole develops into an adult frog by the process of___________
Question 42 :
After fertilisation, the resulting cell which gives rise to a new
individual is the
Question 43 :
The eggs of fish are covered by hard shells for protection. TRUE or FALSE?
Question 45 :
In human beings, after fertilisation, the structure which gets
embedded in the wall of uterus is
Question 47 :
State the following statement True or False:-
In each hydra, there may be one or more bulges. These bulges are the developing new individuals and they are called buds.
Question 48 :
The stage of the embryo in which all the body parts can be identified is called a ______.
Question 49 :
Which of the following statements about reproduction in humans is correct?