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प्रश्न
Fill in the blank.
Pollen grains are formed by ______ division in locules of anthers.
उत्तर
Pollen grains are formed by meiotic division in locules of anthers.
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संबंधित प्रश्न
Draw a sectional view of human female reproductive system and label the part where
(i) eggs develop.
(ii) fertilisation takes place.
(iii) fertilised egg gets implanted.
Describe, in brief, the changes the uterus undergoes
(i) to receive the zygote.
(ii) if zygote is not formed
Suggest three contraceptive methods to control the size of human population, which is essential for the health and prosperity of a country. State the basic principle involved in each.
What are the different methods of contraception?
The diagram shown below is the longitudinal section of a testis of man. Study it carefully and answer the questions that follow
(i) Label the parts numbered 1 to 3 in the diagram.
(ii) In which part of the testis are the sperms produced?
(iii) State the functions of the parts labelled 1 and 3 in the diagram.
Give appropriate biological/technical terms for the following:
The kind of twins formed from two fertilized eggs.
State the exact location of the Proximal convoluted tubule.
Choose the ODD one out from the following terms given and name the CATEGORY to which the others belong :
Prostate gland, Cowper’s gland, seminal vesicle, seminiferous tubules
Give biological explanations for All the food chains begin with green plants.
What are the organs in humans which produce the gametes?
What are the female sex cells in humans called?
What do the testes in a man produce?
Write the names of female sex hormones.
Draw a labelled diagram of the human female reproductive system. With the help of this diagram, explain the working of human female reproductive system.
What joins embryo to placenta in mother's body?
Fertilisation results immediately in the formation of :
(a) a zygote
(b) an embryo
(c) a placenta
(d) a foetus
Which one of the following best describes the function of the umbilical cord? It :
(a) feeds the embryo with digested substances.
(b) conveys nutrients and wastes to and from the embryo respectively
(c) removes waste matter from the embryo to the mother's blood.
(d) supplies oxygenated blood from the mother to the embryo.
Rewrite the terms in the correct order so as to be in a logical sequence.
Implantation, ovulation, child birth, gestation, fertilisation.
State the role of placenta in the development of embryo.
Sketch and label human female reproductive system.
Is the woman responsible for sex-determination of child? Justify your answer.
Complete the following statement by choosing the correct alternative:
Sterilization in female is due to cutting off of ______.
Give the function of the following:
Uterus
Define the following:
Parthenogenesis
Define the following:
Gestation
Give two important unique features of the human reproductive system.
Rewrite the following terms in a correct and logical sequence:
The luteal phase, follicular phase, menstrual phase, ovulatory phase.
What do you understand by an inguinal hernia?
The below diagram is of a developing embryo is a mother’s womb:
(i) Write the functions of the placenta, amnion, and umbilical cord.
(ii) How are the waste products of a fetus removed?
(iii) What is the gestation period?
Name the Following
What does this abbreviation stand for LH?
Name the Following
What does this abbreviation stand for IUD?
State the Location:
Prostate gland
Choose the Odd One Out:
The mature sperms are stored in the ____________.
Mention the importance of the position of the testes in humans.
The following is the illustration of the sequence of ovarian events (a-i) in a human female.
Write the difference between C and H.
Cryptorchidism is a condition where ______.
The living organisms can be unexceptionally distinguished from the non-living things on the basis of their ability for ______.
Arrange and rewrite the terms in the group in the correct order to be in a logical sequence beginning with the term that is underlined:
Testis, Urethra, Sperm duct, epididymis.
