Which one of the following is categorised as a parasite in the true sense?
Human foetus developing inside the uterus draws nourishment from the mother
Head louse living on the human scalp as well as laying eggs on human hair
The cuckoo (koel) lays its eggs in crow's nest
The cuckoo (koel) lays its eggs in crow's nest
B.
Head louse living on the human scalp as well as laying eggs on human hair
Human louse (pediculus) lives among hair and surface of human body feeding on blood. It spreads diseases like typhus.
Which one of the following also acts as a catalyst in a bacterial cell?
sn RNA
hn RNA
23 S rRNA
23 S rRNA
Which one of the following statements in wrong in case Bhopal gas tragedy?
Thousands of human beings died
Radioactive fallout engulfed Bhopal
It took place on the night of December 2/3, 1984
It took place on the night of December 2/3, 1984
Which one of the following acts as a physiological barrier to the entry of microorganisms in the human body?
Tears
Monocytes
Skin
Skin
What was the most significant trend in the evolution of modern man (Homo sapiens) from his ancestors?
shortening of jaws
Binocular vision
Increasing brain capacity
Increasing brain capacity
'Himgiri' developed by hybridization and selection for disease resistance against rust pathogens is a variety of
Maize
sugarcane
wheat
wheat
At which stage of HIV infection does one usually shows symptoms of AIDS?
When viral DNA is produced by reverse transcriptase
When HIV replicates rapidly in helper T- lymphocytes and damages large number of these
With 15 days of sexual contact with an infected person
With 15 days of sexual contact with an infected person
