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Which of the following statements are co...

Which of the following statements are correct ?
(a) Bacteria are the sole members of the kingdom monera
(b) Some bacteria can survive without oxygen and some of them are pathogenic
(c )Bacteria reproduce by sexual method of reproduction
(d)Heterotrophic bacteria use chemical energy for food synthesis
(e)Some archaebacteria show symbiotic association with cattles.

A

(a), (b) and (c) are correct

B

(c), (d) and (e) are correct

C

(a), (b) and (e) are correct

D

(a), (c) and (d) are correct

Text Solution

AI Generated Solution

The correct Answer is:
To determine which statements about bacteria are correct, let's analyze each statement one by one. ### Step-by-Step Solution: 1. **Statement (a)**: "Bacteria are the sole members of the kingdom Monera." - **Analysis**: The kingdom Monera includes all prokaryotic organisms, which are primarily bacteria. Therefore, this statement is **correct**. 2. **Statement (b)**: "Some bacteria can survive without oxygen and some of them are pathogenic." - **Analysis**: There are bacteria that can survive in anaerobic conditions (without oxygen), and some of these bacteria are indeed pathogenic (disease-causing). An example is Clostridium, which is anaerobic and pathogenic. Thus, this statement is **correct**. 3. **Statement (c)**: "Bacteria reproduce by sexual method of reproduction." - **Analysis**: Bacteria primarily reproduce asexually through binary fission, which does not involve the formation of gametes. Therefore, this statement is **incorrect**. 4. **Statement (d)**: "Heterotrophic bacteria use chemical energy for food synthesis." - **Analysis**: Heterotrophic bacteria obtain their food from organic sources and do not synthesize their own food using chemical energy. This statement is **incorrect**. Autotrophic bacteria, such as chemoautotrophs, use chemical energy for food synthesis. 5. **Statement (e)**: "Some archaebacteria show symbiotic association with cattle." - **Analysis**: Some archaebacteria do form symbiotic relationships with cattle, particularly in the digestive system where they help in breaking down cellulose. Hence, this statement is **correct**. ### Conclusion: The correct statements are: - (a) Bacteria are the sole members of the kingdom Monera. - (b) Some bacteria can survive without oxygen and some of them are pathogenic. - (e) Some archaebacteria show symbiotic association with cattle. Thus, the correct answers are statements **A, B, and E**.
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