Advertisements
Advertisements
प्रश्न
Define the term Implantation.
उत्तर
The fertilised egg (zygote) soon starts developing and by the time it reaches the uterus, a small ball of numerous cells is already formed. This is a kind of embryo which forms a pit in the wall of the uterus and gets fixed in it. This natural way of fixing of the embryo in the wall of the uterus is called implantation. This produces the state of pregnancy.
APPEARS IN
संबंधित प्रश्न
Which mode of reproduction gives rise to variation?
How does reproduction help in providing stability to populations of species?
Give two differences between a zygote and a foetus.
Differentiate between Parthenocarpy and Parthenogenesis. Give one example of each.
name the organ which produces male sex cells.
What is formed when two gametes fuse?
Give reason for the following:
The parents and off-springs of organisms reproducing sexually have the same number of chromosomes.
Answer in one sentence.
Outline the path of sperm upto the urethra.
Explain the formation of the embryo.
Rose plants produce large, attractive bisexual flowers but they seldom produce fruits. On the other hand a tomato plant produces plenty of fruits though they have small flowers. Analyse the reasons for failure of fruit formation in rose.
Both these plants - rose and tomato - both selected by human beings for different characteristics, the rose for its flower and tomato for its fruit. Roses, being vegetatively propagated do not need to produce seeds.
