Class XI & XII · Biology practice
Zoology PYQs Check your understanding, bookmark questions and revisit your mistakes.
Enable JavaScript to check answers and save progress. Stored explanations remain available below.
407 questions in this collection · Page 21 of 41
Human Reproduction
In human beings, at the end of 12 weeks
(first trimester) of pregnancy, the following is observed:
A Eyelids and eyelashes are formed B Most of the major organ systems are formed C The head is covered with fine hair D Movement of the foetus
Show explanation
Bookmark
Try again
Request an AI explanation using Show explanation.
Reproductive Health
Progestogens alone or in combination with estrogens can be used as a contraceptive in the form of:
A Implants only B Injections only C Pills, injections and implants D Pills only
Show explanation
Bookmark
Try again
Request an AI explanation using Show explanation.
Reproductive Health
Which of the following STDs are not curable?
A Genital herpes, Hepatitis B, HIV infection B Chlamydiasis, Syphilis, Genital warts C HIV, Gonorrhoea, Trichomoniasis D Gonorrhoea, Trichomoniasis, Hepatitis B
Show explanation
Bookmark
Try again
Request an AI explanation using Show explanation.
Reproductive Health
Select the option including all sexually transmitted diseases.
A Gonorrhoea, Syphilis, Genital herpes B Gonorrhoea, Malaria, Genital herpes C AIDS, Malaria, Filaria D Cancer, AIDS, Syphilis
Show explanation
Bookmark
Try again
Request an AI explanation using Show explanation.
Reproductive Health
In which of the following techniques, the embryos
are transferred to assist those females who cannot
conceive?
A ZIFT and IUT B GIFT and ZIFT C ICSI and ZIFT D GIFT and ICSI
Show explanation
Bookmark
Try again
Request an AI explanation using Show explanation.
Evolution
From his experiments, S.L. Miller produced amino
acids by mixing the following in a closed flask:
A CH4 , H2 , NH3 and water vapor at 800°C B CH3 , H2 , NH4 and water vapor at 800°C C CH4 , H2 , NH3 and water vapor at 600°C D CH3 , H2 , NH3 and water vapor at 600°C
Show explanation
Bookmark
Try again
Request an AI explanation using Show explanation.
Evolution
Embryological support for evolution was
disapproved by:
A Karl Ernst von Baer B Alfred Wallace C Charles Darwin D Oparin
Show explanation
Bookmark
Try again
Request an AI explanation using Show explanation.
Evolution
Which of the following refer to correct example(s)
of organisms which have evolved due to changes
in environment brought about by anthropogenic
action?
A only (A) B (A) and (C) C (B), (C) and (D) D only (D)
Show explanation
Bookmark
Try again
Request an AI explanation using Show explanation.
Evolution
Flippers of Penguins and Dolphins are examples
of:
A Adaptive radiation B Convergent evolution C Industrial melanism D Natural selection
Show explanation
Bookmark
Try again
Request an AI explanation using Show explanation.
Evolution
After about how many years of formation of earth, life appeared on this planet?
A 500 billion years B 50 million years C 500 million years D 50 billion years
Show explanation
Bookmark
Try again
Request an AI explanation using Show explanation.
Page score: 0/40