Which of the following is a benefit of using biopesticides over chemical pesticides? MCQ with Answer and Explanation

Which of the following is a benefit of using biopesticides over chemical pesticides?
A. They are target-specific and environmentally friendly.
B. They increase soil salinity.
C. They are broad-spectrum and kill all insects.
D. They are non-biodegradable and persist in the environment.
Answer: Option A
Solution (By JKSSB Mock Tests)
Biopesticides, such as Bacillus thuringiensis (Bt), neem extracts, and Trichoderma, are generally target-specific, affecting only certain pests while sparing beneficial organisms, humans, and the environment. They are biodegradable and do not accumulate. Chemical pesticides often kill a wide range of species, persist, and cause pollution. Biopesticides are key in Integrated Pest Management (IPM).

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Practice More Biology Questions

Question #1
Consider the following statements about vitamins:
1. Vitamin A is fat-soluble.
2. Vitamin C is water-soluble.
3. Vitamin D can be synthesized in the skin by sunlight.
Which of the above is/are correct?
A. 1, 2, and 3
B. 1 and 2 only
C. 1 and 3 only
D. 2 and 3 only

Correct Answer: Option A


Explanation:
All three are correct: A is fat-soluble, C is water-soluble, D is synthesized in skin from cholesterol derivatives upon UV exposure.

This question belongs to: Science Biology
Question #2
Assertion (A): The pancreas is a mixed gland.
Reason (R): It has exocrine acini secreting enzymes and endocrine islets secreting hormones.
A. A true, R false.
B. Both A and R are true, but R is not the correct explanation.
C. Both A and R are true, and R is the correct explanation.
D. A false, R true.

Correct Answer: Option C


Explanation:
The pancreas secretes digestive enzymes (exocrine) and insulin/glucagon (endocrine). The reason correctly defines why it is mixed.

This question belongs to: Science Biology
Question #3
Consider statements about Mendel's laws: 1. The Law of Segregation applies to alleles of a single gene. 2. The Law of Independent Assortment applies to genes on the same chromosome. 3. Mendel worked on pea plants. Which are correct?
A. 1 and 3 only
B. 1 and 2 only
C. 1, 2 and 3
D. 2 and 3 only

Correct Answer: Option A


Explanation:
Mendel's Law of Segregation states that allele pairs separate during gamete formation, applying to a single gene. His Law of Independent Assortment applies to genes located on different (non-homologous) chromosomes, not those linked on the same chromosome. Mendel conducted his pioneering genetic experiments on the garden pea, Pisum sativum. Thus, statements 1 and 3 are correct.

This question belongs to: Science Biology