Biology
Assertion (A): Bacillary dysentery is caused due to infection by a protozoan which occurs frequently in children.
Reason: (R): Shigella is a kind of bacillus bacteria which causes bacillary dysentery.
- A is True and R is False.
- A is False and R is True.
- Both A and R are True.
- Both A and R are False.
Related Questions
Assertion (A): Malaria is caused by Plasmodium which is spread by Culex mosquito.
Reason (R): There are two hosts in the life cycle of a malarial parasite which are Anopheles mosquito and humans/monkeys/birds, etc.
- A is True and R is False.
- A is False and R is True.
- Both A and R are True.
- Both A and R are False.
Assertion (A): Gambusia is a kind of fish which should be introduced in ponds. These fishes enhance the oxygen content of the water.
Reason: (R): Gambusia fishes selectively devour mosquito larvae from the ponds. Hence used to control the growth of mosquitoes.
- A is True and R is False.
- A is False and R is True.
- Both A and R are True.
- Both A and R are False.
Assertion (A): Hygiene is defined as the science and practice of maintaining good health.
Reason: (R): Hygiene can be maintained by taking vaccines and antibiotics regularly to keep a person away from diseases.
- A is True and R is False.
- A is False and R is True.
- Both A and R are True.
- Both A and R are False.
Fill in the blanks:
(a) Taking stimulants and …………… are unhealthy habits.
(b) Physical exercise should be …………… and regular.
(c) Public drains and garbage must be covered with …………… powder or lime.
(d) …………… is often designated as public enemy no. 1.
(e) …………… is a parasite which lives on rat's skin.