CUET · BIOLOGY · PYQ PAPER 2025
If 4 individuals in a laboratory population of 40 fruitflies died during a specified time interval, say a week, the death rate in the population during that period is -
- A 10 individual per fruitfly per week
- B 0.1 individual per fruitfly per week
- C 1 individual per fruit-fly per week
- D 4 individual per fruitfly per week
Answer & Solution
Correct Answer
(B) 0.1 individual per fruitfly per week
Step-by-step Solution
Detailed explanation
Death rate \( = \frac{4}{40} \) \( = 0.1 \) individual per fruitfly per week
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from BIOLOGY
- Match List - I with List - II.
Choose the correct answer from the options given below:List - I List - II (A) Citric acid (I) Saccharomyces cerevisiae (B) Ethanol (II) Trichoderma polysporum (C) Cyclosporin A (III) Monascus purpureus (D) Statins (IV) Clostridium butylicum (V) Aspergillus niger CUET 2023 Hard - Read the passage carefully and answer the given questions.
Recombinant DNA Technology Asexual reproduction preserves the genetic information, while sexual reproduction permits variation. Traditional hybridization procedures used in plants and animals breeding very often lead to inclusion and multiplication of undesirable genes along with the desired genes. The techniques of genetic engineering, which include creation of recombinant DNA, use of gene cloning and gene transfer, overcome this limitation and allow us to isolate and introduce only one or a set of desirable genes without introducing genes into the target organism.
In Recombinant DNA Technology, what is the role of the "selectable marker gene"?CUET 2023 Hard - Which one of the following diseases is non-infectious?CUET 2023 Hard
- Typical embryo sac at maturity is:CUET 2025 Easy
- Read the following passage carefully and answer the given questions.
Bioactive molecule, cyclosporin A, that is used as an immunosuppressive agent in organ-transplant patients, is produced by the fungus Trichoderma polysporum. Statins produced by the yeast Monascus purpureus have been commercialised as blood-cholesterol lowering agents. It acts by competitively inhibiting the enzyme responsible for synthesis of cholesterol. Baculoviruses are pathogens that attack insects and other arthropods. The majority of baculoviruses used as biological control agents are in the genus Nucleopolyhedrovirus. These viruses are excellent candidates for species-specific, narrow spectrum insecticidal applications. They have been shown to have no negative impacts on plants, mammals, birds, fish or even on non-target insects. BOD refers to the amount of the oxygen that would be consumed if all the organic matter in one liter of water were oxidised by bacteria. The sewage water is treated till the BOD is reduced. Cheese, is one of the oldest food items in which microbes were used. Different varieties of cheese are known by their characteristic texture, flavour and taste. For example, the large holes in 'Swiss cheese' are due to production of a large amount of CO2 by a bacterium named Propionibacterium sharmanii.
Propionibacterium sharmanii is used for the production of-CUET 2025 Hard - Match List-l with List-ll
List-l (Term) List-II (Feature) (A) Multiple alleles (I) Variation in DNA (B) Mendelian disorder (II) Non segregation of chromatids during cell division (C) Chromosomal disorder (III) Pedigree analysis (D) Mutation (IV) Population study
Choose the correct answer from the options given below:CUET 2025 Easy
More PYQs from CUET
- If \(A=\left[a_{i j}\right]\) is a square matrix of order 2 such that, \(a_{i j}=\left\{\begin{array}{ll}2, & \text { when } i \neq j \\ 0, & \text { when } i=j\end{array}\right.\), then \(\operatorname{det}\left(A^2\right)\) is:CUET 2025 Easy
- Arrange the stages of microsporogenesis in their order of occurrence
(A) Development of pollen from microspores
(B) Formation of microspore tetrad
(C) Sporogenous tissue occupies the center of microsporangium
(D) Meiotic division in the cells of sporogenous tissue
Choose the correct answer from the options given below:CUET 2025 Hard - The value of the integral \(I=\int_{-1}^2|x| d x\) is :CUET 2023 Hard
- \( p \rightarrow n + \nu + A \) In this nuclear reaction A is a/an:CUET 2023 Hard
- Arrange the following ligands in decreasing order of field strength in spectrochemical series.
(A) Br\(^-\)
(B) H\(_2\)\(\mathrm{O}\)
(C) OH\(^-\)
(D) CO
Choose the correct answer from the options given below:CUET 2025 Hard - Assume that an electric field \( (20\hat{i}) \text{ V m}^{-1} \) exists in the region of space. If \( V_0 \) is the potential at the origin and \( V_A \) is the potential at \( x = 1 \text{ m} \), then the potential difference \( V_A - V_0 \) is :CUET 2023 Hard