Description : Development of Sporophyte from gametophyte tissue without fusion of gametes is: (a) Apospory (b) Apogamy (c) Apomixis (d) Parthenogenesis
Last Answer : Ans. ((b))
Description : Which of the following is not a characteristic of coniferales........ a)pycnoxylic wood b)motile male gametes c)presence of resin canal d) fertilization siphonogamous
Last Answer : b)motile male gametes
Description : State Mendel’s law of segregation or law of purity of gametes.
Last Answer : “The pair of factors for a given character separates in equal ratio at the time of gamete formation during meiosis”.
Description : Two linked genes a and b show 20% recombination. the individuals of a dihybrid cross between ++/++ × ab/ab shall show gametes (a) ++ : 80 : : ab : 20 (b) ++ : 50 : : ab : 50 (c) ++ : 40 : : ab : 40 : : + a : 10 : : + b : 10 (d) ++ : 30 : : ab : 30 : : + a : 20 : : + b : 20.
Last Answer : (c) ++ : 40 : : ab : 40 : : + a : 10 : : + b : 10
Description : Purity of water can be assessed by determining one of its following properties instrumentally : (A) pH (B) Refractivity (C) Viscosity (D) Conductivity
Last Answer : (D)Conductivity
Description : Consider the following statement: The ex situ conservation of genetic resources can be done through: (1) Tissue culture practices (2) Maintenance of sanctuaries (3) The establishment of germplasm banks (4) The establishment of national parks
Last Answer : Ans. ((d))
Description : Consider the following statements: The genetic code said to be degenerate and universal which means that, (1) Amino afids may have more than one codon (2) All amino acids have mo than one codon (3) Codons are common for higher and lower organism (4) Codons are not found in bacteria
Description : Prokaryotic genetic material is: (a) Liner DNA + his tones (b) Circular DNA + his tones (c) Liner DNA without his tones (d) Circular DNA without his tones
Description : Genetic engineering is related with: (a) Eugenics (b) Euphenics (c) Euthenics (d) All of these
Description : In Seed testing grow out test is conducted to determine a. Germination b. Genetic purity c. Viability d. Physical purity
Last Answer : b. Genetic purity
Description : Why must gametes only contain half the amount of genetic information of the parent?
Last Answer : As gametes are only the reproductive cells of one parent (either but not both).
Description : Who recognized the importance of floral characters in Taxonomy? Why are floral characters more useful than vegetative characters in classification?
Last Answer : Ans: Linnaeus. Floral characters show more variations and more stable than vegetative characters.
Description : How are mutations useful for crop improvement?
Last Answer : Ans: Mutations bring about genetic variability in crops. Some of them are desirable and such plants are selected and further developed by hybridization.
Description : The desired varieties of economically useful crops are raised bya) Vernalization b) Mutation c) Natural selection d) hybridisation
Last Answer : d) hybridisation
Description : Assertion : Zone refining method is very useful for producing semiconductors. Reason : Semiconductors are of high purity.
Last Answer : Assertion : Zone refining method is very useful for producing semiconductors. Reason : Semiconductors are of high purity.
Description : Cross between hybrid and recessive parent is: (a) Back cross (b) Test cross (c) Monohybrid cross (d) Dihybrid cross Ans. (b) ................................................----- ... - PMT, AIIMS, MBBS,lucknow 1. Largest egg of plant kingdom belongs to: (a) Cycas (b) Pinus (c) Psidium (d) Mangfera
Last Answer : Ans. ((a))
Description : Bisexual flowers are present in both Clerodendron and Scrophularia. Still cross pollination takes place. How?
Last Answer : Ans: In clerodendron the androecium attains maturity earlier than gynoecium and in Scrophulria the gynoecium attains maturity earlier than androecium.
Description : What is test cross?
Last Answer : Ans: Cross between a hybrid or unknown genotype with a recessive parent is called as test cross. It helps in determining the individual as heterozygous or homozygous.
Description : In which cross would you obtain a 9:3:3:1 ratio for F2 Progeny. What is the test cross ratio of the same cross.
Last Answer : Ans: Dihybrid cross. Test cross ratio is 1:1:1:1
Description : Tissue culture is a good technique to a) Cross two varieties b) Rapidly increase the size of a trees by strengthening the stem c) Eliminate virus d) Improve yield of crops
Last Answer : c) Eliminate virus
Description : Polygenic genes show: (a) Different phenotype (b) Different genotype (c) Similar phenotype (d) Similar genotype
Description : Vegetative propagation is an example of
Last Answer : Vegetative propagation is an example of – Recurrent apomixis
Description : Nutmeg is an example of
Last Answer : Nutmeg is an example of – Ruminate endosperm
Description : Define marcescent and acrescent calyx and an example to each.
Last Answer : Ans: Persistant calyx that does not show development after fertilization is marcescent calyx. Ex: Solanum melongena. Persistant calyx that shows development even after fertilization is called as Acrescent calyx. Ex: Physalis
Description : Define aereole and give an example.
Last Answer : Ans: Aereole is elevated region on the Phylloclade of Opuntia which represents a node and consists of spinous modified leaves. The spines are normal spines and hair like spines known as barbs.
Description : What is a complete root parasite? Give an example.
Last Answer : Ans: A complete parasite is achlorophyllous, establishes haustorial connection with both xylem and Phloem of the host to absorb both mineral water and organic food materials from the host plant. Ex: Orobanche
Description : Which group of Plants are called Amphibians of the plant kingdom and give an example.
Last Answer : Ans: Bryophytes are called as Amphibians of the Plant Kingdom. Example is Funaria.
Description : To which family the petro plants belong and give an example.
Last Answer : Ans: Petro plants belong to family Euphorbiaceae. Example is Jatropa
Description : Define self sterility. Give an example
Last Answer : Ans: It is failure of germination of pollen grains on the stigma of the same flower. Ex: Orchids, Passiflorea, Abutilon
Description : What are alleles? Give an example.
Last Answer : Ans: Alternative forms for a gene are called as alleles. Ex: The alleles for length of stem are T and t.
Description : Example of natural vegetative propagation does not include a) Corals b) bulbs c) corms d) rhizomes
Last Answer : a) Corals
Description : Example of plant in which vegetative propagation is occurred by leaves is called a) Cannabisn b) Chrysanthemum c) Cryophyllum d) Brassica
Last Answer : c) Cryophyllum
Description : A common example of stem tuber is a) Ginger b) Garlic c) Onion d) Potato
Last Answer : d) Potato
Description : Do genetic combination of mothers play a significant role in determining the sex of new born? -Biology
Last Answer : The sex of the embryo or the child in humans is determined by the father whereas, the genetic combination of mother does not play a role in determining the sex of the new-born baby.
Description : What characteristics of a fossil would make it useful as an index fossil in determining the relative age of widely separated rock layers?
Last Answer : Feel Free to Answer
Description : How are fossils useful in determining the absolute age of rock?
Last Answer : What is the answer ?
Description : Which of the following statements about an enzyme exhibiting allosteric kinetics with cooperative interaction is false? (A) A plot of V-Vk [s] has a sigmaidal shape (B) An inhibitor may increase the ... Km and Vmax (D) Removal of allosteric inhibitor may result in hyperbolic V-S [s] plot
Last Answer : Answer : D
Description : Which statement is correct regarding the relationship between internal auditing and the external auditor? a. Some judgments relating to the audit of the financial statements are those of the ... opinion expressed, however that responsibility may be reduced by any use made of internal auditing
Last Answer : Certain aspects of internal auditing may be useful in determining the nature, timing and extent of external audit procedures.
Description : Q4. What is genetic manipulation? How is it useful in agricultural practices? -Science
Last Answer : Genetic manipulation is process in which the transfer of genes takes place from one organism to another. Here gene of a particular character is introduced inside the chromosome cell and hence ... plants like brinjal, cabbage, rice, cauliflower, and maize crops to get protection from insects
Description : A drug obtained through genetic engineering and useful for treating ingertility is
Last Answer : A drug obtained through genetic engineering and useful for treating ingertility is A. Calcitonin ... C. Interleukins D. Tissue palaminogen activator
Description : Two bacteria found to be very useful in genetic engineering experiments are (a) Nitrobacter and Azotobacter (b) Rhizobium and Diplococcus (c) Nitrosomonas and Klebsiella (d) Escherichia and Agrobacterium.
Last Answer : (d) Escherichia and Agrobacterium.
Description : Two microbes found to be very useful in genetic engineering are (a) crown gall bacterium and Caenorhabditis elegans (b) Escherichia coli and Agrobacterium tumefaciens (c) Vibrio cholerae and a tailed bacteriophage (d) Diplococcus sp. and Pseudomonas sp
Last Answer : (b) Escherichia coli and Agrobacterium tumefaciens
Description : Identify the wrong statement with regard to restriction enzymes. (a) Each restriction enzyme functions by inspecting the length of a DNA sequence. (b) They cut the strand of DNA at palindromic sites. (c) They are useful in genetic engineering. (d) Sticky ends can be joined by using DNA ligases.
Last Answer : d) Sticky ends can be joined by using DNA ligases.
Description : Can you show me an example of how a 10 dimensional graph could be useful?
Last Answer : These two are the most talented practitioners of information presentation that I know about : Edward Tufte David McCandless. I don’t think I’ve seen anything with 10 dimensions represented, but these two would be my guides if I needed to attempt it.
Description : How do you care for an orchid?
Last Answer : I have two, and they require almost no care except water. It is the time of year they shed their blossoms so don’t worry. In the spring they will come right back.
Description : Where's can I buy one of those new "Jumbo" Venus Flytrap's?
Last Answer : You can buy them at The Little Shop of Horrors.
Description : What happens to a fully grown fruit tree if it is transplanted?
Last Answer : Fruit trees are so cheap…why not just plant a new one?
Description : What is the mechanism for motion in plants?
Last Answer : dude, I think this can be googled…. ;-P sorry if i sound like a smart alec….
Description : What is cookoo spit?
Last Answer : answer:You’re close. The guys inside the foam are called Spittle Bugs and there are 23,000 species of them More info
Description : What is Cerebellum ?
Last Answer : The segment on the opposite side of the pons is the cerebellum. It stays in a very buoyant state.