Description : $ Those plants which produce seeds, without the formation of fruits are called Gymnosperms. ! Endosperm is triploid in Angiospherms
Last Answer : $ Those plants which produce seeds, without the formation of fruits are called Gymnosperms. ! Endosperm is ... D. If both As and R are wrong.
Description : Double fertilization is (1) Fusion of two male gametes of a pollen tube with two different eggs (2) Fusion of one male gamete with two polar nuclei (3) Fusion of two male gametes with one egg (4) Syngamy and triple fusion
Last Answer : (4) Syngamy and triple fusion
Description : Double fertilization in angiosperms produces? -Biology
Last Answer : answer:
Description : In angiosperm, triple fusion is necessary for the formation of: (a) Embryo (b) Pollen (c) Endosperm (d) Leaf
Last Answer : Ans. ((c))
Description : $ Zygotic meiosis occurs at the time of germination of zygote. ! Zyogote may be diploid or triploid
Last Answer : $ Zygotic meiosis occurs at the time of germination of zygote. ! Zyogote may be diploid or triploid A. If ... is wrong D. If both As and R are wrong.
Description : The role of double fertilisation in angiosperms is to produce (a) cotyledons (b) endocarp (c) endosperm (d) integuments.
Last Answer : (c) endosperm
Description : .In Pinus/Cycas/gymnosperms, the endosperm is (a) triploid (b) haploid (c) diploid (d) tetraploid.
Last Answer : (b) haploid
Description : .The endosperm of gymnosperm is (a) diploid (b) polyploid (c) triploid (d) haploid.
Last Answer : (d) haploid.
Description : Endosperm in gymnosperm is............. a) haploid b)diploid c)triploid d)tetraploid
Last Answer : a) haploid
Description : Result of double fertilization in angiosperms? -Biology
Description : Double fertilization is found in: (a) Bryophytes (b) Angiosperms (c) Gymnosperms (d) Pteridophytes
Last Answer : Ans. ((b))
Description : 11.Theploidy of the zygote in angiosperms after double fertilization is (a) 4n (b) n (c) 2n (d) 8n.
Last Answer : (c) 2n
Description : Double fertilization is exhibited by : (1) Algae (2) Fungi (3) Angiosperms (4) Gymnosperms
Last Answer : (3) Angiosperms
Description : Double fertilization is exhibited by: a) Gymnosperms b) Algae c) Fungi d) Angiosperms
Last Answer : d) Angiosperms
Description : Double fertilization in Angiosperms was discovered by
Last Answer : Double fertilization in Angiosperms was discovered by – Nawaschin
Description : Describe double fertilization in angiosperms.
Last Answer : Ans: Occurrence of two types of fertilizations in the same embryosac is called as double fertilization. It was discovered by Nawaschin in Fritillaria and Lilium. It is a feature of angiosperms. ... . It was discovered by Nawaschin in Fritillaria and Lilium. PEN develops into endosperm.
Description : $ Angiosperms produce seeds, but do not produce fruits. ! Fruit and seed formation occurs in Gymnosperms.
Last Answer : $ Angiosperms produce seeds, but do not produce fruits. ! Fruit and seed formation occurs in Gymnosperms. A. ... wrong D. If both As and R are wrong.
Description : Double fertilisation and triple fusion were discovered by (a) Hofmeister (b) Nawaschin and Guignard (c) Leeuwenhoek (d) Strasburger
Last Answer : (b) Nawaschin and Guignard
Description : Double fertilisation is (a) fusion of two male gametes of a pollen tube with two different eggs (b) fusion of one male gamete with two polar nuclei (c) fusion of two male gametes with one egg (d) syngamy and triple fusion.
Last Answer : (d) syngamy and triple fusion.
Description : Explain endosperm development in angiosperms. -Biology
Description : In angiosperms, functional megaspore develops into (a) embryo sac (b) ovule (c) endosperm (d) pollen sac.
Last Answer : a) embryo sac
Description : Conifers differ from grasses in the (a) formation of endosperm before fertilization (b) production of seeds from ovules (c) lack of xylem tracheids (d) absence of pollen tubes.
Last Answer : (a) formation of endosperm before fertilization
Description : 102.Perisperm differs from endosperm in (a) being a diploid tissue (b) its formation by fusion of secondary nucleus with several sperms (c) being a haploid tissue (d) having no reserve food.
Last Answer : (a) being a diploid tissue
Description : 2. Perisperm and endosperm differ in a. Being a diploid tissue b. Being a haploid tissue c. Having no reserve food d. Formation of perisperm by fusion of the secondary nucleus with many sperms
Last Answer : d. Formation of perisperm by fusion of the secondary nucleus with many sperms
Description : Perisperm differs from endosperm in :a)Being a diploid tissueb)Its formation by fusion of secondary nucleus with several sperms c)Being a haploid tissued)Having no reserve food
Last Answer : 3Being a diploid tissue
Description : $ Circinate ptyxis is found in Angiosperms. ! The male reproductive organs of Angiosperms are called antheridia.
Last Answer : $ Circinate ptyxis is found in Angiosperms. ! The male reproductive organs of Angiosperms are called antheridia. A ... D. If both As and R are wrong.
Description : $ Tracheophytes are the plants with vascular tissues. ! Tracheophytes are of three types (i) Pteridophytes (ii) Gymnosperms (iii) Angiosperms
Last Answer : $ Tracheophytes are the plants with vascular tissues. ! Tracheophytes are of three types (i) Pteridophytes (ii ... D. If both As and R are wrong.
Description : What is triple fusion in flowering plants? -Biology
Description : Difference between syngamy and triple fusion -Biology
Description : What is triple fusion? -Biology
Description : What is triple fusion? Name the nuclei involved in triple fusion.
Last Answer : Ans: Fusion of male gamete with diploid secondary nucleus to form triploid primary endosperm nucleus is known as triple fusion. In triple fusion two polar nuclei and one male gamete are involved.
Description : $ Fertilization with the help of a pollen tube is called Siphonogamy. ! Entry of pollen tube into the ovule through integuments is called Mesogamy.
Last Answer : $ Fertilization with the help of a pollen tube is called Siphonogamy. ! Entry of pollen tube into the ovule ... wrong D. If both As and R are wrong.
Description : Endosperm is formed during the double fertilisation by (a) two polar nuclei and one male gamete (b) one polar nuclei and one male gamete (c) ovum and male gamete (d) two polar nuclei and two male gametes.
Last Answer : (a) two polar nuclei and one male gamete
Description : Male gametophyte in angiosperms produces (a) single sperm and two vegetative cells (b) three sperms (c) two sperms and a vegetative cell (d) single sperm and a vegetative cell.
Last Answer : (c) two sperms and a vegetative cell
Description : Double fertilisation is characteristic of (a) angiosperms (b) anatropous (c) gymnosperms (d) bryophytes.
Last Answer : (a) angiosperms
Description : Double fertilisation is exhibited by (a) algae (b) fungi (c) angiosperms (d) gymnosperms.
Last Answer : c) angiosperms
Description : Which of the following is without exception in angiosperms? (a) Presence of vessels (b) Double fertilisation (c) Secondary growth (d) Autotrophic nutrition
Last Answer : (b) Double fertilisation
Description : Embryo sac occurs in (a) embryo (b) axis part of embryo (c) ovule (d) endosperm.
Last Answer : (c) ovule
Description : Power miller may be called a walking type tractor. A. Double axle C. Single axle B. Triple axle D. None of the above
Last Answer : Single axle
Description : With reference to plant tissue culture select the matching pair: (1) Sterile triploid—banana and seedless fruit (2) Somaclonal variations—differences appearing (3) Embryoids—non-zygatic embryo produced from somatic cells (4) Pulses—belong to cruciferae
Last Answer : Ans. ((a))
Description : . If a diploid cell is treated with colchicine then it becomes (a) triploid (b) tetraploid (c) diploid (d) monoploid
Last Answer : (b) tetraploid
Description : Tetraploid watermelon must be pollinated by ____ plants to produce a seedless watermelon a. Triploid b. Aneuploid c. Diploid d. Tetraploid
Last Answer : Diploid
Description : Generally seedless watermelon is — a. Haploid b. Diploid c. Triploid d. Hexaploid
Last Answer : c. Triploid
Description : Pollination occurs in (a) bryophytes and angiosperms (b) pteridophytes and angiosperms (c) angiosperms and gymnosperms (d) angiosperms and fungi.
Last Answer : (c) angiosperms and gymnosperm
Description : In majority of angiosperms, (a) egg has a filiform apparatus (b) there are numerous antipodal cells (c) reduction division occurs in the megaspore mother cells (d) a small central cell is present in that embryo sac.
Last Answer : (c) reduction division occurs in the megaspore mother cells
Description : Which type of reaction produces the most harmful radiation? (1) Fusion reaction (2) Fission reaction (3) Chemical reaction (4) Photo-Chemical reaction
Last Answer : (2) Fission reaction Explanation: Radiation is one of the byproducts of radioactive decay of unstable atomic nuclei. Nuclear fission is the process on which the operation of most nuclear power plants ... , the nucleus splits into two smaller nuclei of roughly (though not exactly) equal sizes.
Description : Which type of reaction produces the most harmful radiation ? (1) Fusion reaction (2) Fission reaction (3) Chemical reaction (4) Photo-Chemical reaction
Last Answer : Fission reaction