24277 + Interview Questions in Biology in Class 12 Page 52 InterviewSolution

2551.	Question : What form of inheritance does a trait in human have, which is found in the siblings of parents, where the female has the trait, but is never found in siblings of parents, where only the male has the trait?
Answer» X-linked inhertiance Y-linked inhertiance Autosomal INHERITANCE MATERNAL (EXTRANUCLEAR) inheritance ANSWER :D

Discussion

2552.	Question : What for Nucleopolyhedro viruses are being used now a days?
Answer» Solution : Nucleopolyhydroviruses are used as biological control agent specific to some insects. Most of Baculoviruses BELONGS to the genus nucleopolyhedro virus. These viruses are excellent candidate for species- specific narrow SPECTRUM insecticidal application. They do not have negative impact on either PLANT, animal, bird or non-target INSECT, so can be conserved in IPM (Integrated Pest Management program).

Discussion

2553.	Question : What feature is most important in moth pollinated flowers?
Answer» ANSWER :NOCTURNAL

Discussion

2554.	Question : What evidence suggests that Chimpanze is more closely related to humans than other homionid apes
Answer» DNA from sex chromosomes only Chromosome morphology only Fossil remains DNA of both authosomes and sex chromosomes. Solution :Amber. Yellowish to REDDISH FOSSILISED resin of cnifers of MIDDLE tertiary period having preserved PLANT and animal remains on Baltic coast. Used in JEWELLARY.

Discussion

2555.	Question : What evidence suggest that chimpanzee is more closely related to human than other hominid species?
Answer» DNA from SEX CHROMOSOMES only Chromosomes MORPHOLOGY only Fossil remains DNA of both AUTOSOMES and sex chromosomes Answer :D

Discussion

2556.	Question : What does triple fusion and double fertilisation write the significance of double fertilisation?
Answer» Solution :Triple fusion : One of the TWO male gametes fuses with the egg cell. This is known as syngamy and the fused PRODUCT is called an oospore. The other male gamete unites with the Secondary nucleus. This is known as triple fusion (as this involves the fusion of I male nucleus and 2 polar nuclei) and the fused product is called primary endosperm nucleus. (PEN). After fertilization the following changes take place. • Oospore develops into embryo and PEN develops into endosperm • Ovule develops into seed and integuments of ovule develop into seed coat • The outer integument of the ovule forms the testa or outer seed coat The inner integument forms the tegmen or inner seed coat. Ovary develops into fruit and ovary WALL develops into fruit wall called pericarp. • Style, Stamiens, calyx and corolla wither of Significance of double fertilization Importance or double fertilization is the production of seeds from ovules and fruits from ovarian Double fertilization SIGNIFIES the formation of nutritive tissue endosperm in the seed!

Discussion

2557.	Question : What does theory of biogenesis define?
Answer» SOLUTION :LIFE ARISES from pre-existing life

Discussion

2558.	Question : What does theory of special creation state ?
Answer» Solution :All kinds of LIVING ORGANISMS were formed by some supernatural power CALLED God or CREATOR.

Discussion

2559.	Question : What does the terms specification and claim refers with respect to patents?
Answer» Solution :The specification PART is narrative in which the SUBJECT matter of invention is DESCRIBED as how the invention was carried out. The claim specifically defines the scope of the invention to be protected by the patent which the OTHERS MAY not practice.

Discussion

2560.	Question : What does the term phylogeny mean?
Answer» ANSWER :ANCESTRAL HISTORY

Discussion

2561.	Question : What does the term "Timber line' refers to?
Answer» SOLUTION :Timber LINE is an imaginary line in a mountain or higher areas of land that marks the level above which TREES do not GROW. The altitudinal LIMIT of normal tree growth is about 3000 to 4000 m.

Discussion

2562.	Question : What does the term ontogeny mean?
Answer» ANSWER :DEVELOPMENT HISTORY

Discussion

2563.	Question : What does the term 'memory' of the immune system mean?
Answer» SOLUTION :After the human body has recovered from a disease, B-lymphocytes produce memory cells that remain silent in the BLOOD and attack the disease causing organism if it invades again. This second RESPONSE is much quicker than the FIRST response. As a result symptoms of the disease do not APPEAR.

Discussion

2564.	Question : What does the term .memory. of the Immune system mean?
Answer» SOLUTION :When body ENCOUNTERS a PATHOGEN for the first time produce a RESPONSE called Primary response. Primary response is of low intensity. Memory CELLS are formed due to this primary response. These cells are stored in spllen and lymph nodes. When body encounters the same pathogen subsequently then body elicits secondary response. Secondary response is of high intensity.

Discussion

2565.	Question : What does the term 'luxuriance' stands for the plants breeding? Explain.
Answer» Solution :Pseudoheterosis - Also termed as luxuriance. PROGENY superiorityover parents in VEGETATIVE GROWTH but not in yield an ADAPTATION, USUALLY sterile or pooorly fertile.

Discussion

2566.	Question : What does the term 'Frugivorous' mean ?
Answer» Solution :FRUGIVOROUS MEANS fruit eating organisms. e.g owl, MONKEYS.

Discussion

2567.	Question :What does the term 'Endemic' refers to?
Answer» Solution :Any SPECIES found restricted to a SPECIFIED geographical area is referred to as ENDEMIC.

Discussion

2568.	Question : What does the term 'Bisporic development of embryo sac ' refers to ? Give example .
Answer» Solution :In gynoecium , out of four megaspores formed , if TWO are INVOLVED in embryo SAC formation then it is SAID to be bisproic sac . E.g . Peperomia.

Discussion

2569.	Question : What is meant by Eluviation?
Answer» Solution :The movement of decomposed, water SOLUBLE organic and inorganic compounds from the surface to the LOWER layer of SOIL or the carrying away of the same by water is called LEACHING or ELUVIATION.

Discussion

2570.	Question : What does the term 'Bioethics' refers to?
Answer» SOLUTION :Bioethics refers to the study of ethical issues EMERGING from advances in biology and medicine. It is also a MORAL discernment as it relates to medical policy and PRACTICE.

Discussion

2571.	Question : What does the presence of vermiform appendix in man indicate?
Answer» Solution :Vermiform appendix in MAN is the remnant of caecum in herbivorous mammals that contains cellulose-producing bacteria. The ENZYME helps to DIGEST cellulose. The presence of non-functional appendix in man INDICATES that ancestors of man were herbivores but the descendants changed their FOOD habits and became omnivores and the caecum being no longer useful, gradually got reduced.

Discussion

2572.	Question : What does the given reaction show ?
Answer» ANSWER :C

Discussion

2573.	Question : What does the in-situ-conservation mean ?
Answer» ANSWER :On-site CONSERVATION

Discussion

2574.	Question : What does the given diagram represent ?
Answer» Nucleosome Spliceosome HISTONE complex Both (a) and (b) Solution :(a) : In eukaryotes, DNA organisation is complex. There is a SET of positively changed, basic porteins called histones. Histones are rich in the basic aminoacid RESIDUES lysine and arginine. There are five types of histone proteins-`H_(1),H_(2)A,H_(2)B, H_(3) and H_(4)`. Four of them`(H_(2)A, H_(2)B, H_(3) and H_(4))` produce histone octamer called nu body or core of nucleosome . The negatively charged DNA is wrapped around the positively charged histone octamer to form nucleosome. DNA CONNECTING two adjacent nucleosomes is called linker DNA which bears `H_(1)` histone proteins.

Discussion

2575.	Question : What does filiform apparatus do at the entrance into ovule. It
Answer» It helps in the entry of POLLEN TUBE into a synergid It PREVENTS entry of more than ONE pollen tube into the embryo sac. It brings about OPENING of the pollen tube It guides pollen tube from a synergid to egg Answer :A

Discussion

2576.	Question : What does the filiform apparatus do at the entrance into the ovule?(A) It helps in the entry of pollen tube into synergid(B) It prevents entry of more than one pollen tube into the embryosac(C) It brings about opening of the pollen tube(D) It guides pollen tube from a synergid to egg
Answer» It HELPS in the entry of pollen tube into synergid It prevents entry of more than one pollen tube into the embryosac It BRINGS about OPENING of the pollen tube It guides pollen tube from a synergid to egg Answer :A

Discussion

2577.	Question : what does the following figure depict?
Answer» Uterine CANCER TUBECTOMY OVARIAN cancer Vasectomy ANSWER :B

Discussion

2578.	Question : What doesthe cavity ofauditorycapsule contianin frog ?
Answer» Endolymph Perilymph OTOLITHS OPERCULUM ANSWER :B

Discussion

2579.	Question : What does the condition synteny refers to ?
Answer» SOLUTION :The TWO GENES that are SUFFICIENTLY far APART on the same chromosome are called unlinked genes or syntenic genes . Such condition is known as synteny.

Discussion

2580.	Question : What does the blastocoel of mammalian embryo phylogenetically signify about the ancestors?
Answer» Solution :It is the site where EMBRYOS of ancestral forms LODGED FOOD MATERIAL in the FORM of yolk.

Discussion

2581.	Question : What does the Bt stands for in the popular crop Bt-cotton.
Answer» SOLUTION :BACILLUS thuringiensis

Discussion

2582.	Question : What does the base tier of the ecological pyramid represent?
Answer» SOLUTION :PRODUCERS

Discussion

2583.	Question : What does the base tier of the ecological pyramid represent ?
Answer» Solution :The base layer of ECOLOGICAL PYRAMID PRODUCERS or, three ecological pyramids are presented in FIRST traditional layer. (i) Number pyramid (II) Biomass pyramid (iii) Energy pyramid

Discussion

2584.	Question :What does the above diagram illustrate? Name the parts labelled 'a' and 'b'.Name the types of cells that produce this molecule.
Answer» Solution : An ANTIBODY MOLECULE a-Antigen BINDING SITE, b-heavy chain 13-lymphocytes (B-cells).

Discussion

2585.	Question : What does sex ratio indicate?
Answer» SOLUTION :SEX RATIO indicates GENDER equality and status of women in the country.

Discussion

2586.	Question : What does S-Shaped pattern of population growth represent? How is J-shaped pattern different from it and why?
Answer» Solution :(a) S SHAPED GROWTH represents a kind of growth when responses are limiting the growth. RESOURCES for growth for most animal POPULATIONS are finite and become limiting. The logistic growth model is a more realistic one. (b) J shaped pattern represents a kind of growth when the resources are not limiting, whereas the S shaped curve represents when resources are limiting the growth.

Discussion

2587.	Question : What does SBEI stand for ……….
Answer» SOLUTION :STARCH BRANCHING ENZYME

Discussion

2588.	Question : What does 'Red' indicate in the IUCN Red list (2004) ?
Answer» Solution :RED INDICATES the species that are at the verge of BECOMING EXTINCTION or THREATENED species.

Discussion

2589.	Question : What does NCB stands for? Mention its role.
Answer» SOLUTION :The NARCOTICS Control Bureau (NCB) is the nodal drug law enforcement and intelligence AGENCY of INDIA and is responsible for fighting drug trafficking and the abuse of ILLEGAL substances.

Discussion

2590.	Question : What does 'K' represent in the equation given below? (dN)/(dt)=rN((K-N)/(K))
Answer» Population density at TIME 't' Intrinsic RATE of natural increase Carrying capacity The BASE of natural logarithm Answer :C

Discussion

2591.	Question : What does LAB stands for ? Give two examples.
Answer» SOLUTION :LAB stands for LACTIC Acid BACTERIA Examples for LAB : Lactobacillus locatis, STREPTOCOCCUS locatis.

Discussion

2592.	Question : State Jordon's rule.
Answer» SOLUTION :In some aquatic environments, an INVERSE relationship between water temperature and fish MERISTIC characters is OBSERVED - lower the temperature, more the vertebrae.

Discussion

2593.	Question : What does J-shaped growth curve of a population indicate?
Answer» Solution :RAPID POPULATION growth in an AREA with plenty of food and little predation.

Discussion

2594.	Question : What does 'IUCD' indicate ?
Answer» SOLUTION :IUCD means Intra UTERINE Contraceptive DEVICE.

Discussion

2595.	Question : What does inflorescence of Cannabis sativa yield?
Answer» Solution :INFLORESCENCE of Cannabis sativa YIELDS MARIJUANA, hashish, charas and GANJA.

Discussion

2596.	Question : What does indel mutation refers to ?
Answer» SOLUTION :Addition or DELETION mutations are actually additions or DELETIONS of nucleotide pairs and also called BASE PAIR addition or deletions. Collectively , they are termed as indel mutations.

Discussion

2597.	Question : What does ICSI stands for? Describe the technique.
Answer» Solution :ICSI stands for Intra-Cytoplasmic Sperm Injection. In this method, a sperm is CAREFULLY injected into the CYTOPLASM of the EGG and the zygote formed is allowed to divide till 8 celled stage and TRANSFERRED to uterus. FERTILIZATION occurs in 75-85% of eggs injected with sperm.

Discussion

2598.	Question : What does H in 'd' and 'III' refer to in the enzyme Hind III ?
Answer» Solution :.H. from NAME of genus Haemophilus, .in. for influenza. .d. from name of strain Rd and .III. indicates the order in which the ENZYME were isolated from Rd strain of BACTERIA.

Discussion

2599.	Question : What does ELSI represents to?
Answer» Solution :ELSI which represents ETHICAL, LEGAL and SOCIAL implications of biotechnology broadly covers the relationship between biotechnology and society with particular REFERENCE to ethical and legal aspects.

Discussion

2600.	Question : What does fish-like tadpole larva of frog signify?
Answer» SOLUTION : It INDICATES that AMPHIBIANS have evolved from fish-like AQUATIC ancestors.

Discussion

Explore topic-wise InterviewSolutions in .

Question : What form of inheritance does a trait in human have, which is found in the siblings of parents, where the female has the trait, but is never found in siblings of parents, where only the male has the trait?

Question : What for Nucleopolyhedro viruses are being used now a days?

Question : What feature is most important in moth pollinated flowers?

Question : What evidence suggests that Chimpanze is more closely related to humans than other homionid apes

Question : What evidence suggest that chimpanzee is more closely related to human than other hominid species?

Question : What does triple fusion and double fertilisation write the significance of double fertilisation?

Question : What does theory of biogenesis define?

Question : What does theory of special creation state ?

Question : What does the terms specification and claim refers with respect to patents?

Question : What does the term phylogeny mean?

Question : What does the term "Timber line' refers to?

Question : What does the term ontogeny mean?

Question : What does the term 'memory' of the immune system mean?

Question : What does the term .memory. of the Immune system mean?

Question : What does the term 'luxuriance' stands for the plants breeding? Explain.

Question : What does the term 'Frugivorous' mean ?

Question :What does the term 'Endemic' refers to?

Question : What does the term 'Bisporic development of embryo sac ' refers to ? Give example .

Question : What is meant by Eluviation?

Question : What does the term 'Bioethics' refers to?

Question : What does the presence of vermiform appendix in man indicate?

Question : What does the given reaction show ?

Question : What does the in-situ-conservation mean ?

Question : What does the given diagram represent ?

Question : What does filiform apparatus do at the entrance into ovule. It

Question : What does the filiform apparatus do at the entrance into the ovule?(A) It helps in the entry of pollen tube into synergid(B) It prevents entry of more than one pollen tube into the embryosac(C) It brings about opening of the pollen tube(D) It guides pollen tube from a synergid to egg

Question : what does the following figure depict?

Question : What doesthe cavity ofauditorycapsule contianin frog ?

Question : What does the condition synteny refers to ?

Question : What does the blastocoel of mammalian embryo phylogenetically signify about the ancestors?

Question : What does the Bt stands for in the popular crop Bt-cotton.

Question : What does the base tier of the ecological pyramid represent?

Question : What does the base tier of the ecological pyramid represent ?

Question :What does the above diagram illustrate? Name the parts labelled 'a' and 'b'.Name the types of cells that produce this molecule.

Question : What does sex ratio indicate?

Question : What does S-Shaped pattern of population growth represent? How is J-shaped pattern different from it and why?

Question : What does SBEI stand for ……….

Question : What does 'Red' indicate in the IUCN Red list (2004) ?

Question : What does NCB stands for? Mention its role.

Question : What does 'K' represent in the equation given below? (dN)/(dt)=rN((K-N)/(K))

Question : What does LAB stands for ? Give two examples.

Question : State Jordon's rule.

Question : What does J-shaped growth curve of a population indicate?

Question : What does 'IUCD' indicate ?

Question : What does inflorescence of Cannabis sativa yield?

Question : What does indel mutation refers to ?

Question : What does ICSI stands for? Describe the technique.

Question : What does H in 'd' and 'III' refer to in the enzyme Hind III ?

Question : What does ELSI represents to?

Question : What does fish-like tadpole larva of frog signify?