In human female, the blastocyst
forms placenta even before implantation
gets implanted into uterus three days after ovulation
gets nutrition from uterine endometrail secreation only after implantation
gets nutrition from uterine endometrail secreation only after implantation
D.
gets nutrition from uterine endometrail secreation only after implantation
Implantation is the attachment of blastocyst to the uterine wall (endometrium). It occurs after 6-7 days of fertilisation. during Implantation, the trophectoderm (trophoblast) comes in contact with the endometrium of the uterus and sinks into a pit formed in the endometrium and get completely buried in the endometrium. Trophoblast cells form specialised structures called villi, which help in absorption of nutrient materials.
In genetic engineering, a DNA segment (gene) of interest, is transferred to the host cell through a vector. Consider the following four agents (A-D) in the regard and select the correct option about which one or more of these can be used as a vector/vectors
A) A bacterium
B) Plasmid
C) Plasmodium
D) Bacteriophage
A, B and D only
A only
A and C only
A and C only
The Indian rhinoceros is a natural inhabitant of which one of the Indian states?
Uttarakhand
Uttar Pradesh
Himachal Pradesh
Himachal Pradesh
Signal from fully developed foetus and placental ultimately lead to parturition which requires the release of
oestrogen fro placenta
oxytocin from maternal pituitary
oxytocin from foetal pituitary
oxytocin from foetal pituitary
Which one of the following techniques is safest for the detection of cancer?
Magnetic Resonance Imaging (MRI)
Radiography (X -ray)
Computed Tomography (CT)
Computed Tomography (CT)
Which one of the following cannot be used for the preparation of vaccines against plague?
Formalin - inactivated suspensions of virulent bacteria
Avirulent live bacteria
Synthetic capsular polysaccharide material
Synthetic capsular polysaccharide material
The fruit fly, Drosophila melanogaster was found to be very suitable for experimental verification of chromosomal theory of inheritance by Morgan and his colleagues because
It reproduces parthenogenetically
a single mating produces two young files
smaller female is easily recognisable from larger male
smaller female is easily recognisable from larger male
Secretions from which one of the following are rich in fructose, calcium and some enzymes?
Male accessory glands
Liver
Pancreas
Pancreas
In eukaryotic cell transcription, RNA splicing and RNA capping take place inside the
ribosomes
nucleus
dictyosomes
dictyosomes
A person suffering from a disease caused by Plasmodium experiences recurring chill and fever at the time when the
sporozoites released from RBCs are being rapidly killed and broken down inside spleen
trophozoites reach maximum growth and give out certain toxins
Parasite after its rapid multiplication inside RBCs ruptures them, releasing the stage to enter fresh RBCs
Parasite after its rapid multiplication inside RBCs ruptures them, releasing the stage to enter fresh RBCs
