Q1
mcq
1 mark
In which type of Parthenogenesis are only males produced?
- A. Arrhenotoky
- B. Thelytoky
- C. Amphitoky
- D. Both (a) and (c)
Solution hidden
Log in to view solution →
Q2
mcq
1 mark
Statement I : Castration (or) surgical removal of testis is known as Orchidectomy.
Statement II : It leads to difficulty in urination.
- A. Statement I and Statement II are not correct.
- B. Statement I and II are correct.
- C. Statement I is not correct and Statement II is correct.
- D. Statement I is correct and Statement II is not correct.
Solution hidden
Log in to view solution →
Q3
mcq
1 mark
Select the incorrect action of hormonal contraceptive pills from the following.
- A. Changes in cervical mucus impairing its ability to allow passage and transport of sperms
- B. Inhibition of spermatogenesis
- C. Alteration in uterine endometrium to make it unsuitable for implantation
- D. Inhibition of ovulation
Solution hidden
Log in to view solution →
Q4
mcq
1 mark
This pedigree symbol represents :
- A. Male
- B. Monozygotic twins
- C. Mating
- D. Dizygotic twins
Solution hidden
Log in to view solution →
Q5
mcq
1 mark
Hershey and Chase’s experiment with bacteriophage showed that :
- A. DNA contains radioactive sulphur.
- B. Protein gets into the bacterial cells.
- C. Viruses undergo transformation.
- D. DNA is the genetic material.
Solution hidden
Log in to view solution →
Q6
mcq
1 mark
Find out the wrongly matched pair.
- A. Y-chromosome - 231 genes
- B. Chromosome-1 - 2968 genes
- C. Dystrophin - 2.4 million bases
- D. Human genome - 300 bases
Solution hidden
Log in to view solution →
Q7
mcq
1 mark
The wings of birds and butterflies is an example of :
- A. Divergent evolution
- B. Adaptive radiation
- C. Variation
- D. Convergent evolution
Solution hidden
Log in to view solution →
Q8
mcq
1 mark
Which of the following groups of diseases have been controlled by the use of vaccines and by creating awareness among the people ?
- A. Small pox, amoebiasis, diphtheria, tetanus.
- B. Small pox, polio, diphtheria, tetanus.
- C. Small pox, AIDS, diphtheria, tetanus.
- D. Small pox, common cold, diphtheria, tetanus.
Solution hidden
Log in to view solution →
Q9
mcq
1 mark
Allergy involves :
- A. IgA
- B. IgE
- C. IgM
- D. IgG
Solution hidden
Log in to view solution →
Q10
mcq
1 mark
The most common substrate used in distilleries for the production of ethanol is __________.
- A. Molasses
- B. Soya meal
- C. Corn meal
- D. Groundgram
Solution hidden
Log in to view solution →
Q11
mcq
1 mark
Assertion (A) : In nature many organisms produce clones through asexual reproduction.
Reason (R) : By this process, genetically identical individuals are produce
- A. TØÖ ©ØÖ® Põµn® Cµsk® uÁÖ.
- B. TØÖ \› BÚõÀ Põµn® uÁÖ.
- C. TØÖ ©ØÖ® Põµn® \› BÚõÀ TØÖ PõµnzvØS \›¯õP ö£õ¸¢uÂÀø».
- D. TØÖ ©ØÖ® Põµn® Cµsk® \›, TØÖ PõµnzvØS \›¯õP ö£õ¸¢xQÓx.
Solution hidden
Log in to view solution →
Q12
mcq
The relationship between sucker fish and shark is __________.
- A. Predation
- B. Competition
- C. Parasitism
- D. Commensalism
Solution hidden
Log in to view solution →
Q13
mcq
The term “Niche” was first used by __________.
- A. John Ray
- B. Charles Darwin
- C. Jordon
- D. Charles Elton
Solution hidden
Log in to view solution →
Q14
mcq
Which one of the following are at higher risk of extinction due to habitat destruction ?
- A. Amphibians
- B. Mammals
- C. Echinoderms
- D. Birds
Solution hidden
Log in to view solution →
Q15
mcq
__________ is/are an ideal disinfectant for waste water.
- A. Boiling
- B. U-V Rays
- C. Ozonisation
- D. Chlorination
Solution hidden
Log in to view solution →
Q18
short answer
Differentiate - Leading strand and Lagging strand.
Solution hidden
Log in to view solution →
Q19
short answer
How does Neanderthal man differ from the Modern man in appearance ?
Solution hidden
Log in to view solution →
Q21
short answer
Draw the structure of Lymph node and label the parts.
Solution hidden
Log in to view solution →
Q23
short answer
Differentiate hibernation and aestivation.
Solution hidden
Log in to view solution →
Q24
short answer
What are the gases that cause the Green House Effect ?
Solution hidden
Log in to view solution →
Q25
short answer
Draw Gemmule in sponges and label the parts.
Solution hidden
Log in to view solution →
Q26
short answer
What are the three strategies to be implemented in India to attain total reproductive health ?
Solution hidden
Log in to view solution →
Q27
short answer
Why are sex linked recessive characters more common in the male human beings ?
Solution hidden
Log in to view solution →
Q28
short answer
What are the three structural differences between RNA and DNA ?
Solution hidden
Log in to view solution →
Q29
short answer
What do you think about it is not possible to produce vaccine against “common cold” ?
Solution hidden
Log in to view solution →
Q30
short answer
What is SMOG and how is it harmful for us ?
Solution hidden
Log in to view solution →
Q32
short answer
Name the active chemical found in the medicinal plant Rauwolfia Vomitoria. What type of diversity it belongs to ?
Solution hidden
Log in to view solution →
Q33
short answer
Classify the antibiotics based on their action on bacteria.
Solution hidden
Log in to view solution →
Q34
long answer
5 marks
(a) Describe the structure of the human ovum with a neat labelled diagram.
OR
(b) Give an account on population regulation.
Solution hidden
Log in to view solution →