.webp)
CBSE Class 12 Biology Chapter 14 Competency-Based Questions With Answer Key: Are you also a class 12 student looking for these competency-based questions to practise for the exam? Well, don’t worry as we got you covered. This article will provide insights on the Competency-based queries and the answer key for the academic year 2024-25. Students can download the PDF for free along with the questions and the answers, all in one place.
CBSE Class 12 Biology Chapter 14 Competency-Based Questions With Answer Key
1. Two statements are given below - one is an Assertion (A) and the other is Reasoning (R).
Assertion (A): Continued inbreeding increases fertility and heterozygosity. Reasoning (R): Closely related individuals within the same breed who do not have a common ancestor for 4-6 generations are mated to develop pure lines. Which of the following is correct?
A. Both A and R are true, and R is a correct explanation for A.
B. Both A and R are true, but R is not a correct explanation for A.
C.A. is true, but R is false.
D. A is false, but R is true.
Answer
A is false, but R is true.
2. In Multiple Ovulation Embryo Transfer Technology (MOET), a sheep who acts as the genetic mother is artificially inseminated. The embryos are recovered non-surgically and transferred to surrogate mothers. What is the purpose of having separate genetic and surrogate mothers?
A. The surrogate mother has a shorter pregnancy term.
B. The genetic mother cannot mate with the bull naturally.
C. The surrogate mother cannot produce multiple eggs per cycle.
D. The genetic mother can undergo multiple rounds of superovulation.
Answer
The genetic mother can undergo multiple rounds of superovulation.
3. A laboratory is developing a hybrid Basmati rice cultivar with the objective of increased grain length. Following are some details:
Desired characteristics: require less water and mature early than traditional Basmati cultivars.
Parent cultivars: Pusa 614–1-2 and Pusa 614–2–4-3 States grown in Punjab, Haryana, and Uttarakhand
A scientist outlined the steps for testing it before the release: growing the cultivar in research fields
and recording yield under ideal irrigation
growing in farmers’ fields for at least three growing seasons at several locations in the country representing all the agroclimatic zones where the crop is usually grown. As a fellow scientist, you have to recommend another key aspect of testing that your colleague has missed. Select the appropriate recommendation from below.
A. Growing in the coastal belts of India
B.cultivating for at least 4 growing seasons
C.choosing parents with disease resistance
D. comparing the yield against a reference cultivar
Answer
comparing the yield against a reference cultivar
4. The Neelagiri breed of sheep is distributed in Tamil Nadu. For a few generations, the animals have been producing poor quality of wool. One Neelagiri sheep has been selected for out-crossing with another sheep to improve the wool quality. Select the statement that describes the relationship between the two sheep.
A. They are animals of different breeds.
B. They are animals of different species.
C. They are related animals of the same breed.
D. They are unrelated animals of the same breed.
Answer
They are unrelated animals of the same breed.
5. Consider two statements. The capacity to generate a whole plant from any cell is called totipotency. Any part of a diseased plant can be cultured in a laboratory to recover healthy plants. Choose the correct option.
A. Statement I is true, and II is the reason.
B.Statement II is true, and I is the reason.
C.Statement I is true, but statement II is false.
D. Statement II is true, but statement I is false.
Answer
Statement I is true, but statement II is false.
6. Complete the following sentence by selecting the correct option. The tangelo is a fruit produced by crossing Citrus reticulata and Citrus maxima plants. It is an example of.
A.inbreeding
B.out-crossing
C.cross-breeding
D. interspecific hybridisation
Answer
interspecific hybridisation
Somatic hybridisation is the artificial technique of creating a hybrid plant by combining the desirable characteristics of two plants.
Which of the following conditions MUST be satisfied by the two cells used for somatic hybridisation?
A. They are gametes
B. They lack cell walls
C. They contain chlorophyll.
D. They belong to the same species
Answer
- They lack cell walls.
To get other questions and answers as well, students can take a look at the PDF that can be downloaded for free.
Other Related Links
Comments
All Comments (0)
Join the conversation