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प्रश्न
In markets, eggs of birds are available but never eggs of dogs, why?
उत्तर
Birds are oviparous, i.e. lay eggs outside their body. So, it is easy to collect their eggs and these are thus available in market.
On the contrary, dogs are viviparous, i.e. do not lay eggs but give birth to young ones. Their eggs are extremely small which remain inside their bodies.
APPEARS IN
संबंधित प्रश्न
Give the appropriate term for the following:
Process of fusion of ovum and sperm.
State whether the following statement is true or false:
Fertilization occurs in the vagina.
Name the female sex hormones and structures which secrete them.
Give Reasons
The acrosome of sperm secretes an enzyme called hyaluronidase at the time of fertilization
Study the diagram given below and then answer the questions that follow:
(i) Name the part labeled A. Name any two hormones produced by the part labeled A.
(ii) What happens to the part labeled B.
(1) if fertilization takes place?
(2) If fertilization does not take place?
(iii) Where does fertilization occur?
(iv) Draw a neat diagram of the human sperm as seen under high magnification and label the following parts.
(1) Acrosome
(2) Mitochondria
Give a labeled structure of ovum.
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Sperm is a single cell.
Multiple Choice Question:
Fertilization means:
Give scientific reason.
The new individual produced by sexual reproduction always has the recombined genes of both the parents.
Name the parts of fallopian tubes.
