What are antibiotics? What precautions must be taken while taking antibiotics?
Solution and Explanation
The medicines that kill or stop the growth of the disease – causing microorganisms are called antibiotics.
For example: Streptomycin, tetracycline, etc.
Following precautions must be taken while taking antibiotics:
- Antibiotics should be taken only on the advice of a qualified doctor.
- One must finish the course prescribed by the doctor.
- Antibiotics must be avoided when not needed or in wrong doses.
Top Questions on Microorganisms and Us
Questions Asked in CBSE Class VIII exam
- What are the two different ideas about why so few animals were killed in the tsunami? Which idea do you find more believable?
- CBSE Class VIII
- The Tsunami
Look at picture 1 and recall the opening lines of the original song in Hindi. Who is the singer? Who else do you see in this picture?
- CBSE Class VIII
- Glimpses of the past
- In the following situations identify the agent exerting the force and the object on which it acts. State the effect of the force in each case.
1. Squeezing a piece of lemon between the fingers to extract its juice.
2. Taking out paste from a toothpaste tube.
3. A load is suspended from a spring while its other end is on a hook fixed to a wall.
4. An athlete making a high jump to clear the bar at a certain height.- CBSE Class VIII
- Contact Forces
Fill in the blanks using the correct form of the verbs in brackets.
My little sister is very naughty. When she ____ (come) back from school yesterday, she had _____(tear) her dress. We _____(ask) her how it had _____(happen). She ______(say) she _____ _____ (have, quarrel) with a boy. She _____ _____ (have, beat) him in a race and he _____ ____ (have, try) to push her. She _____ ____ (have, tell) the teacher and so he _____ _____ (have, chase) her, and she _____ _____ (have, fall) down and _____ _____ (have, tear) her dress.
- CBSE Class VIII
- The Best Christmas Present in the world
- Simplify.
(i) (x2– 5) (x + 5) + 25
(ii) (a2+ 5) (b3+ 3) + 5
(iii) (t + s2) (t2 – s)
(iv) (a + b) (c – d) + (a – b) (c + d) + 2 (ac + bd)
(v) (x + y) (2x + y) + (x + 2y) (x – y)
(vi) (x + y) (x2– xy + y2)
(vii) (1.5x – 4y) (1.5x + 4y + 3) – 4.5x + 12y
(viii) (a + b + c) (a + b – c)- CBSE Class VIII
- Multiplying a Polynomial by a Polynomial