Description : What is common between vegetative reproduction and apomixis? (a) Both are applicable to only dicot plants. (b) Both bypass the flowering phase. (c) Both occur round the year. (d) Both produce progeny identical to the parent.
Last Answer : (d) Both produce progeny identical to the parent
Description : Somatic hybridisation is achieved through ?
Last Answer : Somatic hybridisation is achieved through ? A. Grafting B. Protoplast fusion C. Conjugation D. Recombinant DNA technology
Description : Breeding of crops with high levels of minerals, vitamins and proteins is called (a) somatic hybridisation (b) biofortification (c) biomagnification (d) micropropagation.
Last Answer : (b) biofortification
Description : What is common between vegetative reproduction and Apomixis?a)Both are applicable to only dicot plantsb)Both bypass the flowering phasec)Both occur round the yeard)Both produces progeny identical to the paren
Last Answer : Both produces progeny identical to the parent
Description : Which one of the following statements regarding post-fertilisation development in flowering plants is incorrect? (a) Ovules develop into embryo sac. (b) Ovary develops into fruit. (c) Zygote develops into embryo. (d) Central cell develops into endosperm
Last Answer : (a) Ovules develop into embryo sac.
Description : WHY IS THE PROCESS OF FERTILISATION IN A FLOWERING PLANT REFFERED TO AS DOUBLE FERTILISATION ?
Last Answer : ANS. DOUBLE FERTILISATION= SYNGAMY + TRIPLE FUSION SYNGAMY= ONE MALE GAMETE + EGG--- ZYGOTE(n) TRIPLE FUSION= ANOTHER MALE GAMETE+ POLAR NUCLEI-PRIMARY ENOSPERM NUCLEUS(3n)
Description : Formation of diploid embryosac from diploid vegetative structure, e.g., nucellus or integument etc., without meiosis is called: (a) Apospory (b) Apomixis (c) Diplospory (d) Adventives polyembryony
Last Answer : Ans. ((a))
Description : Occurrence of more than one embryo in a seed is known as: a) Polyembryony b) parthenocarpy c) Apomixis d) Embryogeny
Last Answer : Ans: a) Polyembryony
Description : Study of formation, growth and development of new individual from an egg is (a) apomixis (b) embryology (c) embryogeny (d) cytology.
Last Answer : (b) embryology
Description : Consider the following statements about pollination. 1. Transfer of pollen grains from the anther to ovules in the same flower or a different f lower is called pollination. 2. The pollination by wind is called anemophily. 3. Pollination is a ... 1 and 3 (b) 1, 2 and 4 (c) Only 2 (d) 1, 2, 3 and 4
Last Answer : Ans:(c)
Description : Which one of the following is NOT an event of sporulation? a. Symmetrical cell divisions b. Mother cell disintegration c. DNA replication d. Prespore engulfment by the mother cell
Last Answer : a. Symmetrical cell divisions
Description : A process of formation of somatic embryos from callus
Last Answer : Ans. Embryogenesis
Description : Describe the post-zygotic events leading to implantation and placenta formation in humans. Mention any two functions of placenta. [All India 2010] or Explain the process of fertilisation in human female ... events in a sequential order up to implantation of the embryo. [Foreign 2010] -Biology
Last Answer : Post-zygotic events leading to implantation and placenta formation. After implantation of blastocyst, the finger-like projections called chorionic villi, appear on the trophoblast and is surrounded by ... acts as an endocrine gland and secretes hormones like hPL, hCG, oestrogen and progesterone.
Description : Which of the following correctly explains the phenomenon of "Test Tube Bally"? (1) When every process of embryo formation is in the test tube. (2) When the embryo develops in a test tube ... is external and development is internal. (4) When the fertilisation is internal and development is external.
Last Answer : (3) When the fertilisation is external and development is internal. Explanation: Test tube baby is born from in vitro fertilization. In vitro fertilization (IVF) is a process by which an egg ... ) is then transferred to the patient's uterus with the intention of establishing a successful pregnancy.
Description : Which of the following correctly explains the phenomenon of Test Tube Baby ? (1) When every process of embryo formation is in the test tube. (2) When the embryo develops in a test ... is external and development is internal. (4) When the fertilisation is internal and development is external.
Last Answer : When the fertilisation is external and development is internal.
Description : Illustrate the following with the help of suitable diagrams. a) Regeneration in Planaria b) Budding in Hydra c) Spore formation in Rhizopus
Last Answer : Illustrate the following with the help of suitable diagrams. a) Regeneration in Planaria b) Budding in Hydra c) Spore formation in Rhizopus
Description : In vitro fertilisation is a technique that involves transfer of which one of the following into the fallopian tube? (a) Embryo only, upto 8 cell stage (b) Either zygote or early embryo upto 8 cell stage (c) Embryo of 32 cell stage (d) Zygote only
Last Answer : (b) Either zygote or early embryo upto 8 cell stage
Description : Geitonogamy involves (a) fertilisation of a flower by the pollen from another flower of the same plant (b) fertilisation of a flower by the pollen from the same flower (c) fertilisation of a flower ... of a flower by the pollen from a flower of another plant belonging to a distant population.
Last Answer : (a) fertilisation of a flower by the pollen from another flower of the same plant
Description : How seed and fruit are formed in flowering plants? What are the parts of seed?
Last Answer : Seed Formation: - Ripened ovule after fertilization is called seed. The seeds are the embryos of flowering plants in dormant stage. Seeds provide protection and nourishment to the embryo. A seed has three ... fleshy or scaly and forms fruit. Fruit protect seed and help in dispersal of the plant.
Description : Phytohormones are (a) chemical regulating flowering (b) chemical regulating secondary growth (c) hormones regulating growth from seed to adulthood (d) regulators synthesised by plants and influencing physiological processes.
Last Answer : (d) regulators synthesised by plants and influencing physiological processes.
Description : An octahedral complex of `Co^(3+)` is diamagnetic . The hybridisation involved in the formation of the complex is :
Last Answer : An octahedral complex of `Co^(3+)` is diamagnetic . The hybridisation involved in the formation of the complex is : A. ... `d^(2)sp^(3)` D. `sp^(3)d`
Description : Gregor Mendel used pea plants to study a. flowering. b. gamete formation. c. the inheritance of traits. d. cross-pollination.
Last Answer : c. the inheritance of traits.
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 : A change in the amount of yolk and its distribution in the egg will affect (a) pattern of cleavage (b) number of blastomeres produced (c) fertilisation (d) formation of zygote.
Last Answer : a) pattern of cleavage
Description : In some plants, the female gamete develops into embryo without fertilisation. This phenomenon is known as (a) parthenogenesis (b) autogamy (c) parthenocarpy (d) syngamy.
Last Answer : (a) parthenogenesis
Description : Which of the following techniques ar used to create transgenic crops? a. Budding and Grafting in fruit plants b. Cytoplasmic male sterility c. Gene slicing d. Only 1 e. Both 1 and 2 f. Both 2 and 3 g. Both 1 and 3
Last Answer : f. Both 2 and 3
Description : Find out the correct sentence. Hybridisation means crossing between genetically dissimilar plants Cross between two varieties is called as inter speci
Last Answer : Find out the correct sentence. Hybridisation means crossing between genetically dissimilar plants Cross between two ... (iii) D. (iii) and (iv)
Description : High yielding plants can be produced by (1) Crop Rotation (2) Hybridisation (3) Inter-cropping (4) Mixed - cropping
Last Answer : (2) Hybridisation Explanation: Operation Flood in India, a project of the National Dairy Development Board (NDDB) was the world's biggest dairy development programme which made India, a milk-deficient nation, ... world, surpassing the USA in 1998, with about 17 percent of global output in 2010-11.
Description : In plant breeding programmes, the entire collection (of plants/seeds) having all the diverse alleles for all genes in a given crop is called (a) evaluation and selection of parents (b) germplasm collection (c) selection of superior recombinants (d) cross-hybridisation among the selected parents.
Last Answer : (b) germplasm collection
Description : In Antirrhinum two plants with pink flowers were hybridized. The F1 plants produced red, pink and white flowers in the proportion of 1 red, 2 pink and 1 white. What could be the genotype of the two plants used for ... is determined by RR and white by rr genes. (a) rrrr (b) RR (c) Rr (d) rr
Last Answer : (c) Rr
Description : How long after flowering does the seed on a sunflower take ?
Last Answer : Be patient. They will dry out as the day gets shorter and the air dryer. But be careful; the birds (goldfinches, for example) may harvest the seeds before you.
Description : Vernalization is a. Cooling of seed during germination to accelerate flowering b. Warming of seed during germination to accelerate flowering c. Boiling of seed during germination to accelerate flowering d. None of the above
Last Answer : a. Cooling of seed during germination to accelerate flowering
Description : The ovary of a flowering plant can develop into a: a) spore b) fruit c) cone d) seed
Last Answer : ANSWER: B -- FRUIT
Description : Are pollination and fertilization necessary in apomixis? -Biology
Last Answer : answer:
Description : What is apomixis in plant breeding? -Biology
Last Answer : Apomixis (asexual seed formation) is the result of a plant gaining the ability to bypass the most fundamental aspects of sexual reproduction: meiosis and fertilization. Without the need for male fertilization, the resulting seed germinates a plant that develops as a maternal clone
Description : Importance of apomixis in plant breeding? -Biology
Last Answer : Apomixis produces seed progeny that are exact replicas of the mother plant. The major advantage of apomixis over sexual reproduction is the possibility to select individuals with desirable gene combinations and to propagate them as clones.
Description : What is the difference between apomixis and parthenocarpy? -Biology
Description : Difference between parthenocarpy and apomixis. -Biology
Description : $ Asexual reproduction is also called Apomixis. ! Apogamy shortens the life cycle of a plant.
Last Answer : $ Asexual reproduction is also called Apomixis. ! Apogamy shortens the life cycle of a plant. A. If both ... is wrong D. If both As and R are wrong.
Description : Development of saprophyte from gametophyte, is called (a) Apomixis (b) Apospory (c) Apogamy (d) Dip1ospory
Last Answer : Ans. ((c))
Description : When one plant has both male and female flowers separately, is called— (A) Monophrodits (B) Monoecious (C) Hermaphrodite (D) Apomixis
Last Answer : (B) Monoecious
Description : .In a type of apomixis known as adventive embryony, embryos develop directly from the (a) nucellus or integuments (b) zygote (c) synergids or antipodals in an embryo sac (d) accessory embryo sacs in the ovule
Last Answer : (a) nucellus or integuments
Description : WHAT IS APOMIXIS? DESCRIBE ITS IMPORTANCE?
Last Answer : ANS. IT IS THE PROCESS OF DEVELOPMENT OF SEEDS WITHOUT FERTILISATION. EXAMPLE: SOME SPECIES OF ASTERACEAE AND GRASSES. IMPORTANCE: APOMICTIC GENES CAN BE INTRDUED IN HYBRID SEED INDUSTRY.
Description : What is somatic hybridization in plants? -Biology
Description : Crossing of plants through fusion of somatic cell
Last Answer : Ans. Somatic hybridization
Description : Transgenic plants are the ones (a) generated by introducing foreign DNA into a cell and regenerating a plant from that cell (b) produced after protoplast fusion in artificial medium (c) grown in ... medium after hybridization in the field (d) produced by a somatic embryo in artificial medium.
Last Answer : (a) generated by introducing foreign DNA into a
Description : Which one of the following is a case of wrong matching? (a) Somatic – Fusion of two hybridization diverse cells (b) Vector DNA – Site for tRNA synthesis (c) Micropropagation – In vitro production of plants in large numbers (d) Callus – Unorganised mass of cells produced in tissue culture
Last Answer : (b) Vector DNA – Site for tRNA synthesis
Description : 9. Which one of the following is a case of wrong matching ? (1) Callus - Unorganised mass of cells produced in tissue culture (2) Somatic hybridization - Fusion of two diverse cells (3) Vector DNA - Site for t-RNA synthesis (4) Micropropagation - In vitro production of plants in large number
Last Answer : Vector DNA - Site for t-RNA synthesis
Description : Interspecific hybridisation is the mating of (a) animals within same breed without having common ancestors (b) two different related species (c) superior males and females of different breeds (d) more closely related individuals within same breed for 4-6 generations.
Last Answer : (b) two different related species
Description : Critical stages of irrigation in cowpea_____ a Flowering & pod formation b Flowering c Seedling d None of these
Last Answer : a Flowering & pod formation