Download App

Reproductive Health — BIOLOGY STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 ScienceBIOLOGYReproductive Health2 Marks
Question
What does ICSI stand for? Describe the technique.
✓

Answer

Intra Cytoplasmic Sperm Injection.
In this technique a sperm is directly injected into the ovum to form an embryo in the laboratory.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "Short Answer Type Questions [2M]" from Reproductive Health→Reproductive Health — all question types→BIOLOGY STD 12 Science question papers→Bihar Board STD 12 Science question papers→Bihar Board question paper generator→

Similar questions

  1. A true-breeding pea plant, homozygous for inflated green pods is crossed with another pea plant with constricted yellow pods(ff gg). What would be the phenotype and genotype of F1 and F2 generations? Give the phenotype ratio of F2 generation.
  2. State the generalisation proposed by Mendel on the basis of the above-mentioned cross.
→
Describe the contraceptive technique which are highly effective but have very poor reversibility.###Explain: Surgical Methods / Sterilization.
→
What do you understand by Chromosomal disorder? Write names of 3 such disorders.
→
Why is an apple called a false fruit and a banana a parthenocarpic fruit? Explain.
→
Since the origin of life on earth, there were five episodes of mass extinction of species.
  1. How is the 'Sixth Extinction', presently in progress, different from the previous episodes?
  2. Who is mainly responsible for the 'Sixth Extinction?
  3. List any four points that can help to overcome this disaster.
→
  1. Select the homologous structures from the combinations given below:
  1. Forelimbs of whales and bats.
  2. Tuber of potato and sweet potato.
  3. Eyes of octopus and mammals.
  4. Thorns of Bougainvillea and tendrils of Cucurbita.
  1. ​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​State the kind of evolution they represent.
→
Give the full name of the following.
→
List the three parameters used for constructing ecological pyramids. Describe any one instance where the pyramid may look inverted.
→
Match Column I with Column II.
S. No.
Column I
S. No.
Column II
A.
Cleavage
1.
Outer layer of the blastocyst that attaches to the endometrium during implantation.
B.
Implantation
2.
Mitotic divisions of the zygote in quick succession.
C.
Inner cell mass
3.
Embedding of the blastocyst in the endometrium of uterus.
D.
Trophoblast
4.
Release of secondary oocyte from the ovary.
E.
 
5.
Group of cells attached to one end of trophoblast that differentiate into embryo proper.
→
Explain with the help of a suitable example the naming of a restriction endonuclease.
→