Please select a subject first
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Do you justify the statutory ban on amniocentesis in our country? Give reasons.
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Enumerate and describe any five reasons for introducing sex education to school-going children.
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Which of the following group exhibit more species diversity?
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What accounts for the greater ecological diversity of India?
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What is the difference between endemic and exotic species?
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How does species diversity differ from ecological diversity?
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Why is genetic variation important in the plant Rauwolfia vomitoria?
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Suggest a place where one can go to study coral reefs, mangrove vegetation and estuaries.
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Given below are four aspects of Reproductive Health in Column A and their related information in Column B:
| Column A | Column B | ||
| S. No. | Terms used in Reproductive Health | S. No. | Significant information |
| (A) | MTP | (i) | Analysing fetal cells from amniotic fluid of the foetus |
| (B) | Amniocentesis | (ii) | Legalised in 1971 |
| (C) | Saheli | (iii) | Programme initiated in 1951 |
| (D) | Family Planning | (iv) | Non-steroidal oral Planning contraceptive |
Select the correct match from the following options:
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With the help of a neat, labelled diagram describe the human male reproductive system.
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Retroviruses have no DNA. However, the DNA of the infected host cell does possess viral DNA. How is it possible?
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Rearrange the following in the correct sequence to accomplish an important biological reaction:
(a) In vitro synthesis of copies of DNA of interest
(b) Chemically synthesized oligonucleotides
(c) Enzyme DNA-polymerase
(d) Complementary region of DNA
(e) Genomic DNA template
(f) Nucleotides provided
(g) Primers
(h) Thermostable DNA-polymerase (from Thermus aquaticus)
(i) Denaturation of ds-DNA
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Write the location and function of the Sertoli cells in humans.
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State the role of DNA ligase in biotechnology.
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Explain the work carried out by Cohen and Boyer that contributed immensely in biotechnology.
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Name the genes responsible for making Bt cotton plants resistant to bollworm attack. How do such plants attain resistance against bollworm attacks? Explain.
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Why are the human testes located outside the abdominal cavity? Name the pouch in which they are present.
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Write the location and functions of the following in human testes :
Leydig cells
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Humans reproduce ______.
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