CBSE Class 12 Biology HOTs Organisms And Environment

 Organisms And Environment Q.1.Identify the biome distribution with respect to annual temperature and precipitation from the following graph answer the A, B,C&D. Answer: A – Tropical forest              B - Grassland              C – Desert              D – Arctic and…

CBSE Class 12 Biology HOTs Biodiversity And Conservation

Question. Ex situ strategies include I. zoological parks II. seed/pollen banks III. gene bank and tissue cultures IV. botanical garden Choose the correct option. (a) II, III and IV (b) I, II and III (c) I, II and IV (d) I, II, III and IV Answer: D Question. Which one of the…

CBSE Class 12 Biology HOTs Ecosystem

Question. A bear that eats a fish that further ate bugs that ate lgae is a (a) primary producer (b) primary consumer (c) secondary consumer (d) tertiary consumer Answer : D Question. Fill up the blanks. I. Animals which feed directly on plants, are called …A…. II.…

CBSE Class 12 Biology HOTs Biotechnology Principles and Processes

Question. Why foreign DNA cannot pass through cell membrane? (a) DNA is hydrophobic (b) DNA is hydrophilic (c) DNA is rich in proteins (d) DNA is heavy Answer : B   Question. Which of the following has popularised the PCR (polymerase chain reactions)? (A…

CBSE Class 12 Biology HOTs Organism And Population

Question. The attributes of population but not of the individual are (a) birth rate (b) death rate (c) sex ratio (d) All of these Answer : D Question. Select the statement which explains best parasitism. (a) One organism is benefitted (b) Both the organisms are benefitted (c…

CBSE Class 12 Biology HOTs Environmental Issues

Very Short Answer Type Questions Question. What is the raw material for polyblend? Answer : Polyblends are natural man made fibres, made by the mixture of two or more polymers especially plastic waste products Question. Motor vehicles equipped with catalytic to…

CBSE Class 12 Biology HOTs Biodiversity Set A

Q.1. India is one of the twelve mega biodiversity countries of the world. What are the various levels of biodiversity observed in India?   Ans1. Species diversity, gene diversity, ecosystem diversity.   Q.2. India has only 2.4% of the land area of the world but it has 8.1% of…

CBSE Class 12 Biology HOTs Biotechnology And Its Applications

Question. Read the following statements. I. Mendelian factors are now called genes. II. Characters blend in homozygous condition only. III. All characters in human show dominance. IV. Hugo de Vries was involved in rediscovery of Mendel’s works. Which of the above…

CBSE Class 12 Biology HOTs Microbes In Human Welfare

Question. Given below is the diagram of a bacteriophage. In which one of the option, all the six parts A, B, C, D, E and F are correct? (Image 4) (a) A–Head, B–Tail, C–Collar, D–Pins, E–Plate, F–Prongs (b) A–Head, B–Collar, C–Tail, D–Plate, E–Pins, F–Prongs (c) A–…

CBSE Class 12 Biology HOTs Strategies For Enhancement In food Production

  Question. Read the given statements about outcrossing. I. It is the breeding between animals within the same breed which do not have commonancestors on either side of their pedigree up to 4-6 generations. II. It is done to increase milk production and growth rate in…

CBSE Class 12 Biology HOTs Evolution

Question. In Australia, marsupials and placental mammals have evolved to share many similar characteristics. This type of evolution may be referred to as (a) adaptive radiation (b) divergent evolution (c) cyclical evolution (d) convergent evolution Answer : D Question.…

CBSE Class 12 Biology HOTs Principles Of Inheritance And Variation

  Q.1. At which stage of meiosis does the segregation of Mendelian factors can be seen?   Ans1. Anaphase- I   Q.2. Which of the following is a recessive or dominant trait in garden pea? a) Tall stem b) Wrinkled seeds c) Green color seed coat d)…

CBSE Class 12 Biology HOTs Reproductive Health

  Q.1. “Creating awareness among people about various reproductions related aspect and providing facilities and support for building up a reproductively healthy society are the major tasks of a good government. For this various programmes are undertaken”. Name the…

CBSE Class 12 Biology HOTs Human Reproduction

Question. The act of procreation in mammals and humans involve some basic steps. Mention them in a sequence? Answer. Insemination, fertilization, embryogenesis, implantation, development, parturition. Question. Testis / Ovary are called as primary reproductive…

CBSE Class 12 Biology HOTs Sexual Reproduction In Flowering Plants

  Question. It is the tissue in the ovary on which the ovules develop and are attached to the ovary wall .Name this tissue located inside the ovarian cavity? Ans. Placenta. Question. Can you name the object ( a living structure some time back) which can be used as…