MHT CET · BIOLOGY · STD 12 - 13. Organisms and Populations

In a pond there were 500 carp fishes in the beginning of the year. They have a birth rate of 4 offsprings per carp per year. What will be the total number of carp fish at the end of that year?

A 2000
B 2500
C 3000
D 3500

Verified Solution

Answer & Solution

Correct Answer

(B) 2500

Step-by-step Solution

Detailed explanation

The birth rate is = \(\frac{\text { Number of new offsprings }}{\text { Number of offsprings in a population }}\)
\(\therefore 4=\frac{\text { Number of new offsprings }}{500}\)
\(\therefore \) Number of new offsprings \(=4 \times 500\)
\(=2000\)
\(\therefore\) Total number of carp fish at the end of the year
\(=2000+500\)
\(=2500\)

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

Same subject

Match types of poultry breeds in Column I with their examples in Column II.

	Column I Organism		Column II Economic importance
i.	Trachardia lacca	a.	used to produce oils, soaps and isinglass
ii.	Bombyx mori	b.	helps in pollination of crops
iii.	Cirrhina mrigala	c.	resin like substance produced by dermal glands
iv.	Apis mellifera	d.	best quality of mulberry silk is produced

MHT CET 2024 Hard

Match parts of chromosome given in Column I with their explanation in Column II:

Column I (Chromosome)	Column II Column II (Explanation)
Q.1. Centromere	a. Disc shaped plate where spindle fibres get attached during cell division.
Q.2. Secondary constriction	b. Long unbranched slender highly coiled DNA.
Q.3. Kinetochore	c. Place where 2-chromatids are joined together.
Q.4. Chromatonema	d. Nucleolus gets organised at this place.

Choose the correct answer from the following options.

MHT CET 2025 Medium

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