Mention one advantage and one disadvantage of amniocentesis.
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Top Questions on What Are The Evidences For Evolution?
- The ecological pyramids may have an ‘upright’ or an ‘inverted’ shape. Justify with the help of suitable examples.
- CBSE CLASS XII - 2024
- Biology
- What Are The Evidences For Evolution?
- Match the following genes of the lac operon listed in column ‘A’ with their respective products listed in column ‘B’: \begin{center} \begin{tabular}{|c|c|} \hline Column A (Gene) & Column B (Product)
\hline a. ‘i’ gene & (i) \(\beta\)-galactosidase
b. ‘z’ gene & (ii) Lac permease
c. ‘a’ gene & (iii) Repressor
d. ‘y’ gene & (iv) Transacetylase
\hline \end{tabular} \end{center} Select the correct option:- CBSE CLASS XII - 2024
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- If a colour blind female marries a man whose mother was also colour blind, what are the chances of her progeny having colour blindness?
- NEET (UG) - 2023
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- All vertebrates are chordates but all chordates are not vertebrates, why ?
- NEET (UG) - 2020
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- UPSEE - 2017
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Questions Asked in CBSE CLASS XII exam
A bacteria sample of a certain number of bacteria is observed to grow exponentially in a given amount of time. Using the exponential growth model, the rate of growth of this sample of bacteria is calculated. The differential equation representing the growth is:
\[ \frac{dP}{dt} = kP, \] where \( P \) is the bacterial population.
Based on this, answer the following:
- CBSE CLASS XII - 2024
- Differentiability
Self-study helps students to build confidence in learning. It boosts the self-esteem of the learners. Recent surveys suggested that close to 50% learners were self-taught using internet resources and upskilled themselves. A student may spend 1 hour to 6 hours in a day upskilling self. The probability distribution of the number of hours spent by a student is given below:
\[ P(X = x) = \begin{cases} kx^2 & {for } x = 1, 2, 3, \\ 2kx & {for } x = 4, 5, 6, \\ 0 & {otherwise}. \end{cases} \]
Based on the above information, answer the following:
- CBSE CLASS XII - 2024
- Probability Distribution
A scholarship is a sum of money provided to a student to help him or her pay for education. Some students are granted scholarships based on their academic achievements, while others are rewarded based on their financial needs.
Every year a school offers scholarships to girl children and meritorious achievers based on certain criteria. In the session 2022–23, the school offered monthly scholarships of ₹3,000 each to some girl students and ₹4,000 each to meritorious achievers in academics as well as sports.
In all, 50 students were given the scholarships, and the monthly expenditure incurred by the school on scholarships was ₹1,80,000.
Based on the above information, answer the following questions:
- Using integration, find the area of the region enclosed between the curve \( y = \sqrt{4 - x^2} \), and the lines \( x = -1 \), \( x = 1 \), and the \( x \)-axis.
- CBSE CLASS XII - 2024
- Integration
- The perimeter of a rectangular metallic sheet is 300 cm. It is rolled along one of its sides to form a cylinder. Find the dimensions of the rectangular sheet so that the volume of the cylinder so formed is maximum.
- CBSE CLASS XII - 2024
- Absolute maxima and Absolute minima