From Fertilisation to Birth
From Fertilisation to Birth: Overview
In this topic, we will study the concept of fertilisation. We will look at the foetal development process in the womb and understand the pictorial representation of fertilised egg.
Important Questions on From Fertilisation to Birth
Sperms of both Funaria and Pteris were released together near the archegonia of Pteris. Only its sperms enter the archegonia as
Given below are statements: one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: Endometrium is necessary for implantation of blastocyst.
Reason R: In the absence of fertilization, the corpus luteum degenerates that causes disintegration of endometrium.
In the light of the above statements, choose the correct answer from the options given below:
What is indicated by 'e' in the figure?
How many germinal layers does embryo consist of initially, after implantation?
Fertilizins are the substances secreted from
Contraceptive oral pills help in birth control by
In pregnant woman having prolonged labour pains, if the childbirth has to be hastened, it is advisable to administer a hormone that can
Collar-like outgrowth arising from the base of an Ovule and forming a sort of third integument is known as
Double Fertilisation is characteristics of
Generally, the number of Integuments in the ovule of Angiosperms and Gymnosperms is
In Angiosperms, how many microspore mother cells are required to produce 100 pollen grains?
Cross-Pollination is advantageous because it results in
The fertilized egg divides by the process of _____.
If the first cleavage furrow divides zygote completely into two, then the cleavage type is _____.
The events observed by the end of second month of pregnancy are
A disc-like special tissue T develops between the uterus wall and embryo through which all the requirements of the developing embryo (and foetus) are met from the mother's body. The embryo is connected to the tissue T through a string like structure S.
What is the name of tissue T?
Which layer of blastocyst projects into the endometrium and destroys endometrial cells?
Implantation of blastocyst occurs on
Where does the placenta implants in mother?
Identify the human developmental stage shown as well as the related right place of its occurrence in a normal pregnant woman and select the right option for the two, together.
